JP2019125976A - Image forming apparatus, control method of the same, and program - Google Patents

Abstract

To prompt to set a condensation prevention mode for only users who are using in an environment where an error occurs due to condensation.SOLUTION: The image forming apparatus includes: printing means for printing received image data; condensation removal means for removing condensation generated in the image forming apparatus; and condensation error occurrence determination means for determining that an error due to condensation may have occurred; and condensation error information storage means for storing error information when the error occurrence determination means detects an occurrence of an error. When the image forming apparatus is activated, if error information is stored, the condensation removal means is operated.SELECTED DRAWING: Figure 8

Description

  The present invention relates to an image forming apparatus including an electrophotographic recording unit and a facsimile reception function.

  Heretofore, in an image forming apparatus such as an electrophotographic copying machine or printer, dew condensation may occur inside the image forming apparatus due to environmental changes such as temperature and humidity. If condensation occurs in the image forming apparatus, it may not be possible to execute an appropriate image forming process.

For example, dew condensation generated inside a laser scanner provided with a semiconductor laser, a polygon mirror, a light detection sensor, and a large number of lenses causes the polygon mirror and the lens to become cloudy. For this reason, when detecting the laser beam inject | emitted from the semiconductor laser by a light detection sensor, detection of light is made difficult.
On the other hand, the image on the photosensitive drum is drawn by scanning the laser beam line by line. There is a synchronization signal in the scanning direction (horizontal direction) in order to make the start position of each scanning line always the same, which is called a horizontal synchronization signal (BD signal). Since the polygon mirror rotates at a constant speed, the BD signal is output at constant time intervals, but due to condensation, synchronization can not be achieved by the BD signal, and a synchronization detection error (BD error) may occur.

  In the case of fixing a toner image formed in a sheet shape, a fixing device of a heating type is mainly used. When such a heating type fixing device is used, when the sheet is heated by the fixing device, the moisture in the sheet may evaporate from the sheet after fixing, and condensation may occur in the fixing device. Water droplets due to such condensation may adhere to the sheet during sheet conveyance to cause a jam, or a leak due to condensation may cause a printed matter in which an image is corrupted due to charging reduction.

  Patent Document 1 discloses the following technology. That is, it is possible to determine the presence or absence of dew condensation in the device, notify the user, and select whether to perform the dew condensation countermeasure by manual operation. As a result, the user can appropriately select which one of the trouble caused by condensation and the negative effect of the complexity caused by taking condensation measures to be resolved preferentially.

Unexamined-Japanese-Patent No. 2007-232962

  If condensation causes an error that requires a restart and it is restarted by the user, condensation is likely to remain in the aircraft even if the same error did not occur during the restart process. . Therefore, it is necessary to take into consideration the occurrence of jams and image defects after restart, but this is not taken into consideration in Patent Document 1.

  The present invention is intended to solve the problem due to condensation by automatically executing the condensation countermeasure mode and limiting it to users who are used in an environment where image defects may occur due to condensation.

  According to the present invention, a printing unit for printing received image data, a condensation removing unit for removing condensation generated in the image forming apparatus, and a condensation error occurrence determining unit for determining that an error due to condensation may have occurred. And the condensation error information storage unit for storing error information when the condensation error occurrence determination unit detects the occurrence of an error, and when the image forming apparatus is activated, the condensation error information storage unit has an error. When the information is stored, the image forming apparatus is characterized in that the condensation removing unit is operated.

  According to the present invention, it is possible to limit the setting to the dew condensation countermeasure mode only to users who are used in an environment where there may be an image defect due to condensation.

FIG. 2 is a block diagram showing a hardware configuration of an MFP. It is a block diagram which shows the hardware constitutions of a recording part. It is a software block diagram of MFP. It is a flowchart which shows operation | movement of dew condensation determination processing of a recording part, and dew condensation countermeasure processing. It is a flowchart which shows the operation | movement which the error generate | occur | produced at the time of facsimile reception in the state which dew condensation determination processing and dew condensation countermeasure processing are not working. It is a figure of the screen which receives the cancellation instruction | indication of condensation countermeasure processing. It is a figure of the screen which receives the setting instruction | indication of condensation countermeasure mode. It is a flowchart which shows BD error restoration processing. It is a flowchart which shows the process in the case of inquiring a user whether to start condensation countermeasure mode.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The following embodiments do not limit the invention according to the claims, and all combinations of the features described in the embodiments are not necessarily essential to the solution means of the invention.

  Embodiments of the present invention will be described.

FIG. 1 is a block diagram showing the hardware configuration of an MFP (MFP).
As shown in FIG. 1, the MFP 10 includes a CPU 101, a ROM 102, a RAM 103, a display controller 104, a display unit 105, an operation controller 106, and an operation unit 107. The MFP 10 further includes an eMMC host controller 108, an eMMC 109, a reading controller 110, a reading unit 111, a recording controller 112, and a recording unit 113. The MFP 10 further includes a USB host controller 114, a modem 115, a network control unit (NCU) 116, and a network interface card (NIC) 117.

  The CPU 101 collectively controls the devices connected to the system bus 118. The CPU 101 executes the boot program stored in the ROM 102 when the power is supplied. Normally, the boot program loads the main program stored in the storage into the RAM 103 and jumps to the top of the loaded main program. The RAM 103 functions not only as a load location for the main program but also as a work area of the main program.

  The display controller 104 controls drawing on the display unit 105. The display unit 105 is an LCD capable of displaying a character string of 28 characters × 7 lines, a ruled line, a scroll bar, and the like. On the other hand, the operation controller 106 controls an input from the operation unit 107 provided in the MFP 10. The operation unit 107 includes ten keys, cursor keys, one touch keys, and the like.

The reading unit 111 reads an original. An auto document feeder (not shown) is attached to the reading unit 111 as an option, and a plurality of originals can be read automatically. The reading unit 111 is connected to the reading controller 110, and the CPU 101 exchanges data with the reading unit 111 via the reading controller 110.
The recording unit 113 forms an image on a recording sheet by electrophotography. The recording unit 113 will be described later. The recording unit 113 is connected to the recording controller 112, and the CPU 101 exchanges data with the recording unit 113 via the recording controller 112.

  The USB host controller 114 is responsible for USB protocol control, and mediates access to USB devices such as a USB memory (not shown).

The modem 115 modulates and demodulates signals necessary for facsimile communication. Also, the modem 115 is connected to the NCU 116. The signal modulated by the modem 115 is sent out to the public switched telephone network (PSTN) via the NCU 116.
The NIC 117 transmits and receives data bidirectionally with a mail server and a file server via a LAN.

  The MFP 10 according to this embodiment includes an eMMC 109 as a storage. The CPU 101 accesses the eMMC 109 via the eMMC host controller 108.

FIG. 2 is a block diagram showing the hardware configuration of the recording unit 113. As shown in FIG.
As shown in FIG. 2, the recording unit 113 includes a CPU 200, a ROM 201, a RAM 202, and a serial I / F 203. The recording unit 113 also includes an I / O 204, an electrophotographic unit 205, a sheet conveyance unit 206, and an environmental temperature sensor 207.

  The CPU 200 executes the recording unit control program stored in the ROM 201 when power is supplied. The RAM 202 functions as a work area or the like of the recording unit control program. The CPU 200 also receives various instructions transmitted by the main program of the MFP 10 via the serial I / F 203. Then, in accordance with the received various instructions, it controls the electrophotographic unit 205 and the paper conveyance unit 206 via the I / O 204 connected to the system bus 208. Furthermore, the CPU 200 can acquire the temperature measurement result by the environmental temperature sensor 207 via the I / O 204.

FIG. 3 is a software configuration diagram of the MFP 10.
Each unit indicated by a solid line in FIG. 3 is a software module realized by the CPU 101 executing the main program loaded to the RAM 103 by the boot program described above.

  The main program manages and controls the execution of each module described later by the OS (Operating System) 301. The device driver 308 is incorporated in the OS 301. The device driver 308 mediates communication with hardware devices such as the recording controller 112 and the modem 115.

A UI (User Interface) unit 302 provides various information to the user via the display unit 105 and the operation unit 107, and receives various instructions from the user.
A job control unit 303 receives jobs such as copying, printing, and faxing, and controls the execution of the received job.

  The storage unit 306 is a software module that physically stores and manages data such as facsimile transmission and facsimile received images and user settings in the eMMC 109.

  For example, in the MFP 10 of this embodiment, when the job control unit 303 receives a fax job, the scan unit 307 receives a job request and controls the reading unit 111 to scan an original. Then, the scanned facsimile image data is stored in the storage unit 306. The facsimile image data stored in the storage unit 306 is read by the fax unit 304 and facsimile-transmitted to the other party via the MODEM 115 and the NCU 116. Alternatively, image data facsimile-received from the other party via the modem 115 and the NCU 116 is fetched by the fax unit 304 and stored in the storage unit 306.

  The printing unit 305 sends various predetermined commands to the recording unit 113 via the recording controller 112, receives the state of the recording unit 113, and controls the operation of the recording unit 113. For example, when printing a facsimile-received image, after sending a print command to the recording unit 113, the image file stored in the storage unit 306 is read and the image data included in the image file is transferred to the recording unit 113 .

  The MFP 10 according to this embodiment includes a VM (Virtual Machine) / FW (Framework) unit 309. The extended application unit 310 is configured of an arbitrary program or the like described in a script language. Note that the VM / FW unit 309 and the extension application unit 310 have little relationship with the present invention, so detailed description will be omitted.

FIG. 4 is a flowchart illustrating the condensation determination process and the condensation countermeasure process performed by the recording unit.
The process of the flowchart of FIG. 4 can be executed, for example, when the user sets the MFP 10 to operate in the condensation prevention mode. That is, the user can select whether to execute the process of FIG. 4 on the MFP 10 by setting.

  The dew condensation determination process from S401 to S408 is a part of the recording unit control program described in FIG. 2 and is automatically executed when power is supplied to the CPU 200 (FIG. 2).

First, in S401, the CPU 200 acquires the measurement result t (i) of the environmental temperature at a certain point in time i from the environmental temperature sensor 207 (FIG. 2).
Next, in S402, the CPU 200 determines whether condensation prevention processing is being executed. If the condensation countermeasure process to be described later is not being executed, the process proceeds to S403. If it is in execution, the process proceeds to S406.

  In S403, the CPU 200 determines whether the environmental temperature t (i-1) measured a predetermined time S1 before a certain time point i is equal to or lower than a predetermined temperature T1. If it is T1 or less, it will progress to S404. If it is higher than T1, the process proceeds to S406.

  In S404, the CPU 200 determines whether the difference between the environmental temperature t (i) acquired in S401 and the environmental temperature t (i-1) measured before the predetermined time S1 is larger than a predetermined value D. Do. If it is larger than D, the process proceeds to S405. If it is D or less, the process proceeds to S406.

The process of S405 is executed when t (i-1) is equal to or less than T1 in S403 and t (i) -t (i-1) is greater than D in S404.
This is because the environmental temperature is a relatively low temperature at which condensation easily occurs, the ambient temperature rises, and an increase in humidity is considered, which means that the possibility of the occurrence of condensation is high. .
At S405, the CPU 200 starts the condensation countermeasure processing, and proceeds to S406.

At S406, the CPU 200 stores the environmental temperature t (i) acquired at S401.
Then, in step S407, it waits for a predetermined time S1 to elapse.
When the predetermined time S1 has elapsed, i is advanced by one at S408, and the process returns to S401.
That is, the environmental temperature t (i) is measured in the cycle of the predetermined time S1 by S407 and S408.

On the other hand, the process from S410 to S414 is the condensation countermeasure processing, and is started by S405.
First, in S410, the main program operating on the CPU 101 (FIG. 1) is notified of the possibility of condensation via the serial I / F 203 (FIG. 2) (hereinafter referred to as condensation notification) ).

Next, in step S411, the CPU 101 rotates a fan (not shown) provided in the electrophotographic system unit 205 (FIG. 2) at full speed. This is to reduce the temperature inside the fuselage of the MFP 10 so as to match the ambient temperature, and to remove condensation as soon as possible.
In S412, while the fan is being rotated, the process waits until a predetermined time S2 elapses.
If predetermined time S2 passes, it will progress to S413 and a fan will stop.
Then, in S414, as in S410, the main program is notified that the dew condensation has been removed, and the dew condensation countermeasure processing ends.

  FIG. 5 is a flowchart showing a process when an error occurs at the time of facsimile reception with the dew condensation determination process and the dew condensation countermeasure process (FIG. 4) not operating.

The facsimile reception process (fax reception process) is a part of a program that constitutes the fax unit 304 (FIG. 3). Further, control of recording and holding of the facsimile reception image is a part of a program constituting the printing unit 305 (FIG. 3).
Each step shown in the flowchart is realized by the CPU 101 executing a main program developed in the RAM 103.
The process of this flowchart is executed by receiving a job requesting a facsimile via the NCU 116 (FIG. 1).

First, in step S501, facsimile reception is started. When facsimile reception is completed for each page, the received facsimile image is converted into a predetermined image format and stored in the storage unit 306 (FIG. 3) as image data for each page.
Next, in step S502, the CPU 101 determines whether an error has occurred in facsimile reception.
If an error has not occurred, the process advances to step S503. If an error occurs, the facsimile reception process is ended.

In step S503, the CPU 101 determines whether a signal indicating the presence of a subsequent page has been received in the facsimile reception procedure.
If there is a subsequent page, the process returns to S502. If there is no subsequent page, the process proceeds to step S504, assuming that image data of all pages has been received.
In step S504, the CPU 101 starts print processing of the facsimile reception image, and ends the facsimile reception processing.

On the other hand, when the printing process of the facsimile reception image is activated in S504, the process proceeds to the printing process of the facsimile reception image in S510.
In step S511, the CPU 101 determines whether an error has occurred during printing.
If an error has not occurred, the process proceeds to step S512. If an error occurs, the process advances to step S514.

  The errors to be checked here are errors that can not continue the printing process, such as BD errors, image irregularities due to charging decrease, jams, etc. The contents of each error will be described below.

First, a BD error (horizontal synchronization signal error) caused by condensation will be described.
When dew condensation occurs inside a laser scanner provided with a semiconductor laser, a polygon mirror, a light detection sensor, and a large number of lenses, the polygon mirror or the lens becomes fogged when the laser light emitted from the semiconductor laser is detected by the light detection sensor. Let As a result, detection of light by the light detection sensor becomes difficult.
On the other hand, the image on the photosensitive drum is drawn by scanning laser light line by line. Here, in order to make the start position of each scanning line always the same, there is a synchronization signal in the scanning direction (horizontal direction), which is called a horizontal synchronization signal (BD signal).
Since the polygon mirror is rotating at a constant speed, the BD signal is output at constant time intervals. However, if synchronization can not be achieved by the BD signal due to condensation, a synchronization detection error (BD error) may occur.

Next, the charge reduction caused by condensation will be described.
When forming an image, the photosensitive member is charged. However, when the photosensitive member or the bias applying member is dewed, the surface resistance of the photosensitive member or the like is reduced due to the condensation. Therefore, an overcurrent flows on the surface of the photosensitive member, the charging bias can not be kept constant, and the voltage applied to the photosensitive member drops.

Next, jams caused by condensation will be described.
When condensation occurs inside the MFP, water droplets due to condensation may adhere to the sheet during sheet conveyance and cause jamming. In addition, due to the leak due to condensation, the printed matter in which the image irregularity has occurred due to the decrease in the charge may be output.

In the present invention, only some of the above-mentioned errors may be detected as errors caused by condensation. For example, only BD errors may be detected.
In the present embodiment, an example in which only a BD error is to be detected will be described. However, the present invention is not limited to this, and a charge drop error, a jam or the like may be detected.

Referring back to FIG. 5, in step S512, the CPU 101 determines whether printing of image data of all pages is completed.
If all pages have been printed, the process advances to step S513. If printing has not been completed yet, the process returns to step S511.
In step S513, the stored image data is deleted, and the printing process ends.

In S514, the CPU 101 determines whether the error generated in S511 is a BD error.
If it is a BD error, the process proceeds to S515.
Then, in step S515, the CPU 101 stores information indicating that a BD error has occurred in the storage unit 306 (FIG. 3), and proceeds to step S516. If it is not a BD error, the process proceeds to S516.

  In step S516, the CPU 101 requests the UI unit 302 to display a message corresponding to the error generated in step S511 on the display unit 105. Thereafter, the print processing of the image received by facsimile is ended.

  If an error occurs in step S511, the image data saved in step S501 is not deleted. Therefore, it is determined that there is image data in S809 of the flowchart (described later) of BD error recovery processing (described later), and printing of the image data stored in S810 is resumed.

When a BD error or the like occurs as in the process of S516, an error screen is displayed to urge the user to restart the MFP 10. This is because there is a high possibility that appropriate image formation processing can not be performed even if image formation is continued with an error occurring.
In addition, when an error that can not continue the image formation such as a BD error occurs, the execution of the image formation processing may be stopped, the job may not be accepted, or the instruction regarding the image formation processing may not be accepted.

FIG. 8 is a flowchart showing the process of recovering from the dew condensation state.
The present process is executed by the main program based on a user's recovery instruction or at the time of activation of the MFP 10. For example, it is executed by the user restarting the MFP 10 after an error occurs.

First, in step S801, the CPU 101 determines whether an error has occurred that can not execute the startup process normally.
If there is no error that the boot process can not be executed normally, the process advances to step S802. If it occurs, the process proceeds to S811.

In step S802, the CPU 101 determines whether a BD error has occurred.
If a BD error has occurred, the process advances to step S803. If it does not occur, the process advances to step S809.
Note that whether or not a BD error has occurred is determined by whether or not BD error information is stored in the storage unit 306.

In S803, a request to activate the condensation countermeasure process (FIG. 4) is notified to the main program operating in the CPU 200 (FIG. 2) via the serial I / F 203 (FIG. 2). That is, when the BD error information is stored, the condensation countermeasure mode is automatically activated.
Then, in S804, the BD error information is cleared, and the process proceeds to S805.

In step S805, the CPU 101 requests the UI unit 302 to display a cancellation instruction acceptance screen for condensation prevention processing on the display unit 105, and the process advances to step S806.
Here, FIG. 6 shows a screen for receiving an instruction to cancel the condensation countermeasure processing. When the cancel button 601 in the cancel instruction reception screen 600 is pressed, the condensation countermeasure processing is canceled.

Next, in S806, it is determined whether cancellation has been made on the cancellation instruction reception screen for condensation prevention processing.
If the cancellation has not been made, the process proceeds to S807. If the cancellation has been made, the process proceeds to S808.

In S807, the CPU 101 determines whether the notification that condensation has been removed from the main program (S414 in FIG. 4) has been made. If the notification has not been made, the process returns to S806. Thus, the condensation countermeasure processing (FIG. 4) is executed until the user cancels or recovers from condensation.
If the notification that dew condensation has been removed in S807 is made, the process proceeds to S809.
In S808, the CPU 101 notifies the main program operated by the CPU 200 (FIG. 2) of a request to forcibly terminate the condensation countermeasure processing requested in S803, and the processing proceeds to S809. Thus, if there is a cancellation input from the user in S806 or a notification that condensation is removed in S807, the process proceeds to a process for printing image data in S809 and thereafter.

In step S809, the CPU 101 determines whether image data received by facsimile is stored.
If it has been saved, the process proceeds to S810. If not saved, the process ends.
In step S810, the CPU 101 starts print processing (FIG. 5) of the image data that has been received by facsimile, and then the processing ends.

On the other hand, in step S811, the CPU 101 determines whether the error generated in step S801 is a BD error.
If it is a BD error, information indicating that a BD error has occurred is saved in the storage unit 306 (FIG. 3) in S812, and the process proceeds to S813. If a BD error has not occurred, the process proceeds to S813.

  Then, in step S813, the CPU 101 requests the UI unit 302 to display a message corresponding to the error generated in step S801 on the display unit 105 in order to notify the user of the error state, and the processing ends. Do.

Although the above example demonstrated the example which starts the condensation countermeasure mode automatically, it is not restricted to starting automatically. When the condensation information is stored, a screen may be displayed to inquire the user whether to activate the condensation countermeasure mode.
FIG. 7 shows a screen for receiving a start instruction of the condensation prevention mode. When the Yes button 701 in the setting instruction acceptance screen 700 is pressed, the mode shifts to the condensation prevention mode shown in the flowchart of FIG. 4. When the No button 702 is pressed, the transition to the condensation countermeasure mode is not performed.
As a result of inquiring of the user, when an instruction to activate the condensation prevention mode is received, the process proceeds to S804. On the other hand, if an instruction not to activate the condensation countermeasure mode is received, the process may proceed to S809.

FIG. 9 shows a process in the case of inquiring the user whether to activate the condensation countermeasure mode.
Each step shown in the flowchart is realized by the CPU 101 executing a main program developed in the RAM 103.

In step S901, the CPU 101 requests the UI unit 302 to display a condensation countermeasure mode setting instruction reception screen 700 (FIG. 7) for receiving a condensation countermeasure mode setting instruction on the display unit 105.
Next, in step S902, the CPU 101 determines whether or not the condensation countermeasure mode setting instruction acceptance screen 700 has been input.
If no input has been made, the process returns to step S802 to wait for an input from the user.
If the input has been made, this processing ends.
Then, when the Yes button 701 on the setting instruction acceptance screen 700 of the condensation countermeasure mode is pressed, the processing shifts to the execution of the condensation countermeasure processing (FIG. 4). When the No button 702 is pressed, the condensation prevention process is not performed.

  By configuring as described above, it is possible to automatically execute the condensation countermeasure mode and avoid the problem due to condensation, limiting it to the user who is used under the environment where the image defect due to condensation may occur. Become.

<Other Embodiments>
In the above-described embodiment, when printing image data by receiving a facsimile job, a case where an error that can not continue printing has occurred is taken as an example. However, the present invention is not limited to the fax job, and the present invention is applicable even when an error that can not continue printing occurs when performing a process involving printing, for example, when receiving a print job from an external information processing apparatus such as a PC. It is possible.
That is, the step of detecting the occurrence of an error in S511 of FIG. 5, the step of determining whether or not it is a BD error in S514, and the step of storing the BD error information in S515 can be applied to all processes involving printing. . A different point from image printing by facsimile is that no image file is saved in S809 of FIG.

Further, in the above-described embodiment, in the recording section condensation determination processing (FIG. 4), the presence or absence of condensation is estimated from the temperature obtained from the environmental temperature sensor and the temperature change amount per unit time.
However, the determination of the presence or absence of condensation is not limited to this. For example, if a humidity sensor is also provided in the recording unit 113 (FIG. 2), and if condensation is inferred from the measurement results of the environment temperature sensor 207 and the humidity sensor, more accurate determination becomes possible.

Furthermore, the present invention supplies a program that implements the functions of the above-described embodiments to a system or apparatus via a network or storage medium, and one or more processors in the computer of the system or apparatus read and execute the program. Processing is also feasible. It can also be implemented by a circuit (eg, an ASIC) that implements one or more functions.
Further, the present invention may be applied to a system constituted by a plurality of devices or to an apparatus comprising a single device.
The present invention is not limited to the embodiments described above, and various modifications are possible based on the spirit of the present invention, and they are not excluded from the scope of the present invention. That is, all configurations obtained by combining the above-described embodiment and the modifications thereof are also included in the present invention.

10 MFP
101 CPU
113 Recording section

Claims (10)

Printing means for printing the received image data;
Condensation removal means for removing condensation generated in the image forming apparatus;
Condensation error occurrence judging means for judging that there may be an error due to condensation;
Condensation error information storage means for storing error information when the condensation error occurrence determination means detects occurrence of an error;
An image forming apparatus characterized in that, when the image forming apparatus is activated, if the error information is stored in the condensation error information storing unit, the condensation removing unit is operated.   The image forming apparatus according to claim 1, further comprising: a cancel reception unit configured to cancel an operation of removing condensation by the condensation removal unit.   The image forming apparatus according to claim 1, wherein the condensation error occurrence determination unit determines that the error due to condensation may have occurred during the operation of the printing unit.   The image forming apparatus according to any one of claims 1 to 3, wherein the condensation error occurrence determination unit determines that there is a possibility that the error due to condensation has occurred according to a setting of a user.   The image according to any one of claims 1 to 4, wherein the printing unit prints the image data when the image data is stored after the condensation removing unit finishes removing condensation. Forming device.   The image forming apparatus according to any one of claims 1 to 5, wherein the image data is data of a facsimile job by facsimile reception.   The image forming apparatus according to any one of claims 1 to 5, wherein the image data is data of a print job transmitted from an information processing apparatus external to the image forming apparatus.   The condensation error occurrence determination means includes a temperature sensor, and it is possible that the error due to condensation may occur from the temperature measured by the temperature sensor and the change in temperature per hour of the temperature measured by the temperature sensor. The image forming apparatus according to any one of claims 1 to 7, wherein the determination is made. A printing process for printing received image data;
A condensation removal process for removing condensation generated in the image forming apparatus;
Condensation error occurrence judgment step of judging that condensation error may have occurred;
And a condensation error information storage step of storing error information when the occurrence of an error is detected in the condensation error occurrence determination step.
A control method of an image forming apparatus, characterized in that, when the image forming apparatus is started, if the error information is stored in the condensation error information storing step, the dew condensation removing step is operated.   A program for causing a computer to execute the method of controlling an image forming apparatus according to claim 9.

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