Mitsubishi Electric MJ-E14CG-S1-IT Service Manual page 17

(2) LED, LCD and fan tests
① Start: Press the MODE and HUMIDITY SELECTION buttons simultaneously 4 times when the
power is off. Press the POWER button within 2 seconds.
② Mode select: Use the OFF/ON TIMER button to change the diagnosis mode (0 - 5).
LCD and
LED all lit
Examples
For current humidity
(all displays in decimal)
(3) Operation/Error history mode
① Start:
Press the MODE and HUMIDITY SELECTION buttons simultaneously 5 times when the
power is off. Press the POWER button within 2 seconds.
② Mode select: Use the OFF/ON TIMER button to select indicator mode (0-F).
Compressor
malfunction detected
P4 error
Tube temperature
Thermistor short-circuit
detected
E8 error
Tube temperature
Thermistor open-circuit
detected
E7 error
Room temperature
Thermistor short-circuit
detected
E1 error
Room temperature
Thermistor open-circuit
detected
E0 error
(4) Demo program
①
Start: With the power OFF, hold down the MODE and HUMIDITY SELECTION buttons,
and press the POWER button. The demo program starts in 3 seconds.
②
Operations (all buttons are disabled):
① Fan: Fixed at rank 3
② Compressor/solenoid valve: Stopped
③ LCD/LED: Lights in random sequence
④ Swing louvre: Wide
③
End: Remove power plug.
Room
Current
temperature
humidity
indicator
Mode displayed
Error history display
0: Latest error
7: Oldest error
Watchdog error
A6 error
Frequency determination
error at power ON
A2 error
Frequency error
when fan operated
A3 error
Tube
Current fan
temperature
rank
indicator
Example: Latest error display
Latest error
When "display mode" is 8 to F, the number of error
generations is displayed in hexadecimal.
Determined
frequency
Display mode
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