Mitsubishi Electric PUZ-HA24NHA1, Service Manual

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28
OCH750A
[Output pattern A] Errors detected by indoor unit
[Output pattern B]
E9
1. If the beeper does not sound again after the initial 2 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 3 times continuously “beep, beep, beep (0.4 + 0.4 + 0.4 s)” after the initial 2 beeps to confirm
the self-check start signal was received, the specified refrigerant address is incorrect.
OPERATION
INDICATOR
lamp blink
pattern
Beep Beep Beep Beep Beep
Beep Beep
Off
Approx. 2.5 s
On
Approx. 3 s
On
0.5 s
On
0.5 s
On
0.5 s
On
0.5 s
Off
Approx. 2.5 s
On
Approx. 3 s
On
0.5 s
On
0.5 s
· · · Repeated
Number of blinks/beeps in pattern indicates the check
code in the following table (i.e., n=5 for “U2”)
Number of blinks/beeps in pattern indicates
the check code in the following table
n th 1 st 2 nd 3 rd 1
st
2
nd
Self-check
starts
(Start signal
received)
Beeper sounds
[Output pattern B]
OPERATION
INDICATOR
lamp blink
pattern
Beep
Beep Beep Beep Beep Beep Beep
Off
Approx. 2.5 s
On
0.5 s
On
0.5 s
On
0.5 s
On
0.5 s
Off
Approx. 2.5 s
On
0.5 s
On
0.5 s
· · · Repeated
Number of blinks/beeps in pattern indicates the check
code in the following table (i.e., n=5 for “P5”)
Number of blinks/beeps in pattern indicates
the check code in the following table
n
th
1
st
2
nd
3
rd
1
st
2
nd
Self-check
starts
(Start signal
received)
Beeper sounds
• Refer to the following tables for details on the check codes.
[Output pattern A]
Notes:
Beeper sounds/OPERATION
INDICATOR lamp blinks Check code
(Number of times)
IR wireless remote controller Wired remote controller
Errors detected by unit other than indoor unit (outdoor unit, etc.)
Symptom Remark
1
Indoor/outdoor unit communication error
2
(Transmitting error) (Outdoor unit)
3 Open/short of outdoor unit thermistors
4 Compressor overcurrent interruption (When compressor locked)
5
Abnormal high discharge temperature/49C worked/
insufficient refrigerant
6
Abnormal high pressure (63H worked)/Overheating
protection operation
7
Abnormal temperature of heatsink
8
Outdoor unit fan protection stop
9
10
Compressor overcurrent interruption/Abnormal of power module
Abnormality of super heat due to low discharge temperature
11
Abnormality such as overvoltage or voltage shortage and
abnormal synchronous signal to main circuit/Current sensor error
12
13
U2
U5
UP
U3,U4
UF
U1,Ud
U8
U6
U7
U9,UH
Others
–
–
–
–
14
Other errors
For details, check
the LED display
of the outdoor
controller board.
Compressor overcurrent interruption
Beeper sounds/OPERATION
INDICATOR lamp blinks
1
Check code
Symptom Remark
(Number of times)
IR wireless remote controller Wired remote controller
1 P1 Intake sensor error
P9 Pipe (TH5) sensor error
2
P2
Pipe (TH2) sensor error
3 E6, E7 Indoor/outdoor unit communication error
4 P4
Drain sensor error/Float switch connector open
5
P5
PA
Drain pump error
Forced compressor stop(due to water leakage abnormality)
6 P6
Freezing/Overheating protection operation
7 EE Combination error between indoor and outdoor units
8 P8 Pipe temperature error
9 E4, E5
Remote controller signal receiving error
10
–
11
–
–
–
12
14
FB (Fb)
PL
Indoor unit control system error (memory error, etc.)
Abnormal refrigerant circuit
–
E0, E3
– E1, E2
Remote controller control board error
Remote controller transmission error
As for indoor
unit, refer to
indoor unit's
service manual.