Mitsubishi Electric PVA-A30AA4 Service Manual page 24

12-2. 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 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.)
IR 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 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.
• 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 IR 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
RF thermostat
Check code
P1 Intake sensor error
Pipe (Liquid or 2-phase pipe) sensor error
P2, P9
Indoor/outdoor unit communication error
E6, E7
Drain sensor error
P4
Drain pump error
P5
Freezing/Overheating safeguard operation
P6
EE Communication error between indoor and outdoor units
P8 Pipe temperature error
E4 Remote controller signal receiving error
–
–
–
–
Indoor unit control system error (memory error, etc.)
Fb
No corresponding
– –
Wired remote controller
RF thermostat
Check code
Indoor/outdoor unit communication error (Transmitting error) (Outdoor unit)
E9
Compressor overcurrent interruption
UP
Open/short of outdoor unit thermistors
U3, U4
Compressor overcurrent interruption (When compressor locked)
UF
Abnormal high discharging temperature/49C worked/ insufficient refrigerant
U2
Abnormal high pressure (63H worked)/ Overheating safeguard operation
U1, Ud
Abnormal temperature of heat sink
U5
Outdoor unit fan protection stop
U8
Compressor overcurrent interruption/Abnormal of power module
U6
Abnormality of super heat due to low discharge temperature
U7
Abnormality such as overvoltage or voltage shortage and abnormal
U9, UH
synchronous signal to main circuit/Current sensor error
–
–
–
–
Other errors (Refer to the technical manual for the outdoor unit.)
Others
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
22
Remark
Remark
For details, check the LED
display of the outdoor controller
board.
Cause