Number

Information

Conditions & Suggested Measures

M1

The chamber door is open

The chamber door is open.

M2

The lamp chamber door is open

The lamp chamber door is open. If this error occurs when the lamp chamber door is already closed, check the interlock components of the lamp chamber door.

M10

Test completed

If "Display only information" is selected, this message will appear when the test ends. The user needs to manually turn off the device.

M11

Test completed

If "Alarm" is selected, this message will appear when the test ends. An alarm will sound, but the device will continue to run.

M12

Test completed, machine stopped

If "Stop" is selected, this message will appear when the test ends. The device will stop operating.

M13

Test completed, machine stopped

If "Stop + Alarm" is selected, this message will appear when the test ends. The device will stop operating.

M14

Please replace the lamp tube

The lamp tube has been used for 3000 hours.

M15

Please perform routine maintenance - refer to the instruction manual

The device has been running for 2000 hours. For preventive maintenance information, refer to Section 15 of the product manual.

M16

The blackboard temperature is too high: XXX℃

The blackboard temperature is 3 degrees Celsius or higher than the set value and remains so for 55 minutes.

1.The blackboard temperature setpoint is too low relative to the chamber temperature setpoint.
2.The circulation fan (or its drive) is damaged.
3.The fresh air fan (or its drive) is damaged.

M17

The blackboard temperature is too low: XXX℃

The blackboard temperature is 3 degrees Celsius or lower than the set value and persists for 55 minutes.

1.The blackboard temperature setpoint is too high relative to the chamber temperature setpoint.
2.The circulation fan (or its drive) is damaged.
3.The fresh air fan drive is damaged.

M18

The chamber air temperature is too high: XXX℃

The chamber air temperature is 3 degrees Celsius or higher than the set value and remains so for 55 minutes.

1.The setpoint is too low relative to the laboratory temperature.
2.The air heater relay is damaged (startup failure).
3.The fresh air fan (or its drive) is damaged.

4.The circulation fan drive is damaged.

M19

The chamber air temperature is too low: XXX℃

The chamber air temperature is 3 degrees Celsius or lower than the set value and persists for 55 minutes.

1.The setpoint is too high relative to the laboratory temperature.
2.The air heater relay is damaged (failure to turn off).
3.The air heater is damaged.
4.The fresh air fan drive is damaged.
5.The circulation fan (or its drive) is damaged.

M20

The chamber temperature is too high: XX℃

The chamber temperature is too high.

​1.The air heater relay is damaged.
2.The chamber fan is damaged.

M21

The chamber temperature is too low: XX℃

The chamber temperature is below the minimum allowable temperature.

1.The air heater relay is damaged.
2.The air heater is damaged.
3.The chamber fan is damaged.

M24

Laboratory temperature during alarm: XXX℃

Laboratory temperature may be the cause of chamber temperature failure.

M25

The main board temperature is too high: XX℃

The temperature of the main board is higher than the maximum allowable temperature.

It is necessary to move the Q - SUN to an air - conditioned room.

M26

Lamp rectifier fan failure

1.The fan is damaged.
2.The fan relay is damaged.
3.The air flow switch is damaged.

M27

Lamp/rectifier fan is on: should be off

​1.The fan relay is damaged.
2.The air flow switch is damaged.

M28

Humidifier temperature is too high - may be empty: XXX℃

The humidifier temperature is too high.
Please check the water level of the humidifier.

M29

Humidifier temperature is too low: XXX ℃

The humidifier temperature is too low.

Check whether the humidifier water heater is working properly.

M30

Replace the battery

The voltage of the mainboard battery is too low. Please replace the battery.
Note: Dispose of old lithium batteries in accordance with local laws and regulations.

M31

Calibrate the light sensor

The lamp has been used for 500 hours. Please recalibrate the sensor.

M33

Incorrect irradiance calibrator: UC20/340 should be used

The 420 nm or TUV model is used, but a 340 nm sensor is installed on the Q-SUN. 

Use the UC20/340 calibrator.

M34

Incorrect irradiance calibrator: UC20/420 should be used

The 340 nm or TUV model is used, but a 420 nm sensor is installed on the Q-SUN. 

Use the UC20/420 calibrator.

M35

Incorrect irradiance calibrator: UC20/TUV should be used

The 340 or 420 nm model is used, but a TUV sensor is installed on the Q-SUN.

Use the UC20/TUV calibrator.

M38

Light sensor mismatch

The light sensors in the chamber are inconsistent. Please ensure all light sensors are the same.

M43

Spray is off: should be on

The Q-SUN is running the spray step, but the spray is off. Possible causes include:

1.Water supply is turned off.
2.Solenoid valve is damaged.
3.Flow switch is damaged.

M44

Spray is on: should be off

The Q-SUN is not running the spray step, but the spray is on. Possible causes are:

1.The solenoid valve is damaged.
2.The flow switch is damaged.

M45

Humidifier water level is too low

​1.The water supply is turned off.
2.The float valve is damaged.

M49

Power interruption

This message indicates that the power supply was interrupted and then restored during the equipment's operation.
This message will be displayed regardless of the cause of the power outage, including the user manually turning off the power while the equipment is running.
To avoid an M49 error when restarting the Q-SUN, always click STOP before turning off the Q-SUN's power.

M50

Chamber humidity is too high: XX%

The chamber humidity is 5% or more higher than the set value.

M51

Chamber humidity is too low: XX%

The chamber humidity is 5% or more lower than the set value.

M52

Blackboard temperature deviation: XXX ℃

​·The blackboard temperature is 10°C higher than the set value and persists for 1 minute.

1.The blackboard temperature set value is too low relative to the chamber air temperature.
2.The circulation fan (or its drive) is damaged.
3.The fresh air fan (or its drive) is damaged.

M53

The chamber air temperature deviates by XXX ℃

The chamber air temperature is 10°C higher than the set value and persists for 1 minute.

1.The chamber air temperature set value is too low relative to the laboratory temperature.
2.The air heater relay is damaged (failed to turn on).
3.The fresh air fan (or its drive) is damaged.
4.The circulation fan drive is damaged.

M56

The fan controller is damaged.

1.Input voltage fluctuation.
2.Excessively high room temperature.
3.Motor failure.
4.Fan controller malfunction.

M60

Low irradiance: Chan x

The irradiance of the lamp is 5% lower than the set value. Please replace the lamp and recalibrate.

M61

Lamp failure: Chan x

The irradiance is 30% lower than the set value.

1.The lamp is burned out.
2.The rectifier is faulty.
3.The lamp relay is faulty.
4.The trigger electrode is faulty.

M63

High irradiance: Chan x

The irradiance is 5% higher than the set value.

1.The wiring between the rectifier and the mainboard is incorrect.
2.The rectifier is malfunctioning.

M64

Lamp is on: should be off

The Q-SUN is running the dark phase, but the mainboard detects irradiance above 0.05 W/m². Please replace the lamp relay.

M65

AC voltage exceeds the rated range

For 400V equipment, the input voltage is below 320V or above 460V, or the neutral wire is not connected.

M67

Lamp relay malfunction

During the "relay self-check" process, the irradiance is higher than 0.05 W/m². Please replace the lamp relay.

M68

Operation relay malfunction

During the "relay self-check" process, the irradiance is higher than 0.05 W/m². Please replace the operation relay.

M69

Relay check in progress

Displayed during M67 & M68 diagnostics.

M70

Blackboard temperature sensor failure (XXX℃)

The blackboard temperature is below 3°C.
Please replace the blackboard temperature sensor.

M72

Air temperature sensor failure

The air temperature is below 3°C.
Please replace the air temperature sensor.

M74

Laboratory temperature sensor failure

The laboratory temperature is below 3°C.
Please replace the laboratory temperature sensor.

M76

Humidifier temperature sensor failure

The humidifier temperature sensor reading is less than 3°C. Please replace the humidifier temperature sensor.

M77

Temperature and humidity sensor failure

The temperature and humidity sensor reading is below 3%. Please replace the temperature and humidity sensor.

M80

Flash memory failure

The program checksum test has failed. Please contact Q-Lab Maintenance and Equipment Technical Support. For contact information, refer to Section 19 of the product manual.

M81

Flash memory data corruption

The parameter and setting data are corrupted. Please contact Q-Lab Maintenance and Equipment Technical Support. For contact information, refer to Section 19 of the product manual.

 M82

RAM damaged, RAM reloading

RAM data error. Please contact Q-Lab Maintenance and Equipment Technical Support. For contact information, refer to Section 19 of the product manual.

M90

Please replace the temperature and humidity sensor

The temperature and humidity sensor calibration has expired. Please replace the temperature and humidity sensor.

M101

SD card missing

The SD card on the mainboard is missing or not properly installed. Please contact Q-Lab Maintenance. For contact information, refer to Section 19 of the product manual.

M103

System auto-reboot

Q-SUN has automatically rebooted to avoid potential issues during operation. Please contact Q-Lab Maintenance.

M104

Software installed successfully

Software installed successfully.

M900

Status screen communication failure

Communication between the mainboard and the status screen has been interrupted. The equipment will enter single-screen mode.

M901

Main menu screen communication failure

Communication between the mainboard and the main menu screen has been interrupted. The equipment will enter single-screen mode.

M902

Mainboard communication failure

This message will be displayed on the screen where M900 or M901 error messages have occurred.