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Mitsubishi Electric PUHZ-SHW80VHA Service Manual page 32

Heat pump air conditioner
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Refer to the following tables for details on the check codes.
[Output pattern A]
B eeper sounds
B eep
OPERATION
INDICATOR
lamp blink
Off
pattern
Approx . 2.5 s
Self-check
starts.
(Start signal
Number of blinks/ beeps in pattern indicates the check
received)
code in the following table. (i.e., n=5 for "P5")
[Output pattern B ]
B eeper sounds
B eep
OPERATION
INDICATOR
lamp blink
Off
pattern
Approx . 2.5 s
Self-check
starts.
(Start signal
received)
[Output pattern A] Errors detected by indoor unit
Wireless remote controller
B eeper sounds/ OPERATION
INDICATOR lamp blinks
(Number of times)
1
2
3
4
5
6
7
8
9
10
11
12
14
[Output pattern B ]
Errors detected by unit other than indoor unit (outdoor unit, etc.)
Wireless remote controller
B eeper sounds/ OPERATION
INDICATOR lamp blinks
(Number of times)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Notes: 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 seconds)" after the initial 2 beeps to confirm
the self-check start signal was received, the specified refrigerant address is incorrect.
OCH526C
B eep B eep B eep
B eep
st
nd
rd
1
2
3
n
th
On
On
On
On
0.5 s
0.5 s
0.5 s
0.5 s
B eep B eep B eep
st
nd
1
2
On
On
On
Approx . 3 s
0.5 s
0.5 s.
Number of blinks/ beeps in pattern indicates the check
code in the following table. (i.e., n=5 for "U2")
Wired remote controller
Check code
P1
Intake sensor error
P2
Pipe (TH2) sensor error
P9
Pipe (TH5) sensor error
Indoor/ outdoor unit communication error
E6,E7
P4
Drain sensor error/ Float switch connector open
P5
Drain pump error
PA
Forced compressor stop(due to water leakage abnormality)
P6
Freezing/ Overheating protection operation
EE
Communication error between indoor and outdoor units
P8
Pipe temperature error
E4, E5
Remote controller signal receiving error
Fb
Indoor unit control system error (memory error, etc.)
PL
Abnormality of refrigerant circuit
E0, E3
Remote controller transmission error
E1, E2
Remote controller control board error
Wired remote controller
Check code
Indoor/ outdoor unit communication error
E9
(Transmitting error) (Outdoor unit)
Compressor overcurrent interruption
UP
Open/ short of outdoor unit thermistors
U3,U4
Compressor overcurrent interruption (When compressor locked)
UF
U2
Abnormal high discharging temperature/ insufficient refrigerant
Abnormal high pressure (63H operated)/ Overheating
U1,Ud
protection operation
Abnormal temperature of heatsink
U5
Outdoor unit fan protection stop
U8
Compressor overcurrent interruption/ Abnormal of power module
U6
Abnormality of superheat due to low discharge temperature
U7
Abnormality such as overvoltage or voltage shortage and
U9 ,UH
abnormal synchronous signal to main circuit/ Current sensor error
Others
Other errors (Refer to the technical manual for the outdoor unit.)
B eep B eep
1
st
2
nd
· · · Repeated
Off
On
On
Approx . 2.5 s
0.5 s
0.5 s
Number of blinks/ beeps in pattern indicates
the check code in the following table.
B eep
rd
th
3
n
On
On
Off
0.5 s
0.5 s.
Approx . 2.5 s.
Symptom
Symptom
B eep
B eep
st
nd
1
2
· · · Repeated
On
On
On
Approx . 3 s.
0.5 s
0.5 s
Number of blinks/ beeps in pattern indicates
the check code in the following table.
Remarks
As for indoor
unit, refer to
indoor unit' s
service manual.
Remarks
For details, check
the LED display
of the outdoor
controller board.

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