Mitsubishi Electric PEAD Series Service Manual page 29

TROUBLESHOOTING
10-2. SELF-CHECK FUNCTION
Refer to the installation manual that comes with each remote controller for details.
RF thermostat is not established.
[Output pattern A] Errors detected by indoor unit
IR wireless remote Wired remote controller
controller RF thermostat
Beeper sounds/OPERATION
INDICATOR lamp flashes Check code
(Number of times)
1 P1
2 P2, P9
3 E6, E7
4 P4
5 P5
6 P6
7 EE
8 P8
9 E4
10 –
11 –
12 Fb
No sound – –
[Output pattern B] Errors detected by unit other than indoor unit (outdoor unit, etc.)
IR wireless remote Wired remote controller
controller RF thermostat
Beeper sounds/OPERATION
INDICATOR lamp flashes Check code
(Number of times)
1 E9
2 UP
3 U3, U4
4 UF
5 U2
6 U1, Ud
7 U5
8 U8
9 U6
10 U7
11 U9, UH
12 –
13 –
14 Others
*1 If the beeper does not sound again after the initial two beeps to confirm the self-check start signal was received and the
OPERATION INDICATOR lamp does not come on, there are no error records.
*2 If the beeper sounds three times continuously "beep, beep, beep (0.4 + 0.4 + 0.4 sec.)" after the initial two beeps to confirm the
self-check start signal was received, the specified refrigerant address is incorrect.
On IR wireless remote controller
The continuous buzzer sounds from receiving section of indoor unit.
Blink of operation lamp
On wired remote controller
Check code displayed on the LCD.
HWE16080
Symptom
Intake sensor error
Pipe (Liquid or 2-phase pipe) sensor error
Indoor/outdoor unit communication error
Drain sensor error
Drain pump error
Freezing/Overheating safeguard operation
Communication error between indoor and outdoor units
Pipe temperature error
Remote controller signal receiving error
–
–
Indoor unit control system error (memory error, etc.)
No corresponding
Symptom
Indoor/outdoor unit communication error (Transmitting error) (Outdoor
unit)
Compressor overcurrent interruption
Open/short of outdoor unit thermistors
Compressor overcurrent interruption (When compressor locked)
Abnormal high discharging temperature/49C worked/ insufficient
refrigerant
Abnormal high pressure (63H worked)/ Overheating safeguard operation
Abnormal temperature of heat sink
Outdoor unit fan protection stop
Compressor overcurrent interruption/Abnormal of power module
Abnormality of super heat due to low discharge temperature
Abnormality such as overvoltage or voltage shortage and abnormal
synchronous signal to main circuit/Current sensor error
–
–
Other errors (Refer to the technical manual for the outdoor unit.)
29
Remark
Remark
For details, check
the LED display of
the outdoor
controller board.