10 Troubleshooting
Troubleshooting procedure
SMGB0136 rev.0 - 07/2021
236
10.2.1.2 Troubleshooting by alarm code
Alarm code
02
Activation of the safety device (high pressure switch) in the outdoor unit (Except Alarm
codes 41 and 42)
- This alarm is indicated when one of the safety devices is activated during compressor running.
Is it connected to
connector PCN401 of
PCB1?
Yes
Is there continuity
between terminal #1
and #3 of connector PCN401
during stop operation?
(Y52C: OFF)
Faulty PCB
Yes
Are faston PSH
correctly connected to
PSH?
No
No
No
Correctly plug connector
Correctly plug faston
terminals to PSH
Check activation of the
following safety devices.
Remove the cause after
checking. PSH: 4.15MPa
(R32)
Yes
Faulty OU
PCB1
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