10 Troubleshooting
Troubleshooting procedure
SMGB0136 rev.0 - 07/2021
251
10
Alarm code
35
Incorrect capacity setting or combined capacity between indoor unit and outdoor
unit
• The alarm code appears from 3 to 5 minutes after the outdoor unit power activation if any inconsistency according
to capacity is detected between indoor unit and outdoor unit. This applies when indoor unit capacity has no
coincidence with outdoor unit capacity
• This alarm forces all operations to stop (Outdoor & Indoor Units).
• The unit should be stopped to release the alarm.
Alarm code
36
Indoor unit combination error
• This alarm code is indicated in case that there is at least 1 indoor unit of a model other than GP (supporting R32
refrigerant) among the connected indoor units
• This alarm forces all operations to stop (Outdoor & Indoor Units).
• The unit should be stopped to release the alarm.
Alarm code
38
Abnormality of protective circuit for protection (outdoor unit)
• Thealarmcodeappearsincasethatanyofthefollowingisfullled
- In case that there is no PSC (63H) input signal for 5 continued seconds and more than 2 seconds have passed
after switch OFF.
- In case that "Abnormality of the detection circuit for protection (itc=19)" is received from the inverter
microcontroller.
Place the tester as shown in the diagram below to check the connector of PCN401. The connector shall remain
inserted. DC12V will constantly be detected and disturb the diagnosis if the connector of PCN401 is pulled out.
• This alarm forces all operations to stop (Outdoor & Indoor Units).
• The unit should be stopped to release the alarm.
Place [+] of tester to pin number 1 of
PCN401, and [-] to pin number 3.
DC 12V is detected?
Check wiring other than on
DIP-IPM (Note 2)
Yes
Faulty DIP-IPM.
Replace electrical box.
No
Voltage detected
DIP-IPM is
normal
? NOTE
• This alarm may appear if the Faston terminal of the high pressure switch (63H1) is improperly connected or damaged (open-circuit
fault) when the operation is started. Besides this, check also Alarm Code: 02 Activation of Outdoor Unit Protection Device.
• This alarm code may appear at the beginning of the operation if high pressure switch (PSH) is incorrectly connected or fail (open fault).
See also alarm 02.
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