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Mitsubishi Electric Mr.Slim PEAD-RP35JALQ Service Manual Page 28

Series pead, ceiling concealed r410, 2010 split-type, heat pump air conditioners.
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[Output pattern A] Errors detected by indoor unit
Wireless remote controller
Beeper sounds/OPERATION
INDICATOR lamp flashes
(Number of times)
1
2
3
4
5
6
7
8
9
10
11
12
No sound
[Output pattern B] Errors detected by unit other than indoor unit (outdoor unit, etc.)
Wireless remote controller
Beeper sounds/OPERATION INDICATOR
lamp flashes (Number of times)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
*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 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.
• If the unit cannot be operated properly after the above test run has been performed, refer to the following table to remove the cause.
Wired remote controller
PLEASE WAIT
PLEASE WAIT
Error code
Display messages do not appear
even when operation switch is
turned ON (operation lamp does
not light up).
On the wireless remote controller with conditions above, following phenomena takes place.
• No signals from the remote controller are accepted.
• OPE lamp is blinking.
• The buzzer makes a short ping sound.
Note:
Operation is not possible for about 30 seconds after cancellation of function selection. (Correct operation)
Wired remote
controller
Check code
Intake sensor error
P1
Pipe (Liquid or 2-phase pipe) sensor error
P2, P9
E6, E7
Indoor/outdoor unit communication error
Drain sensor error
P4
P5
Drain pump error
Freezing/Overheating safeguard operation
P6
Communication error between indoor and outdoor units
EE
P8
Pipe temperature error
Remote controller signal receiving error
E4
Indoor unit control system error (memory error, etc.)
Fb
– –
No corresponding
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.)
Symptom
LED 1, 2 (PCB in outdoor unit)
After LED 1, 2 are lighted, LED 2 is turned
For about 2 minutes
off, then only LED 1 is lighted. (Correct
following power-on
operation)
Only LED 1 is lighted.
After about 2 min-
utes has expired
following power-on
Only LED 1 is lighted.
twice, LED 2 blinks once.
Symptom
Symptom
• For about 2 minutes after power-on, operation of the
remote controller is not possible due to system start-up.
(Correct operation)
• Connector for the outdoor unit's protection device is not
connected.
LED 1, 2 blink.
• Reverse or open phase wiring for the outdoor unit's power
terminal block (L1, L2, L3)
• Incorrect wiring between indoor and outdoor units
LED 1, 2 blinks
(incorrect polarity of S1, S2, S3)
• Remote controller wire short
28
Remark
Remark
For details, check the LED
display of the outdoor controller
board.
Cause

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