6 Troubleshooting
Troubleshooting by protection code (Outdoor unit)
SMGB0135 rev.0 - 06/2020
74
Alarm code
204
Indoor unit stops answering to Master PC-ARFTE
• This alarm is displayed when an indoor unit stops answering to Master PC-ARFTE for more than 3 minutes.
• Alarm recovery: When the communication is established again the alarm is recovered.
Alarm code
205
Central Alarm, no Central message
• This alarm is displayed there is no messages from the central for more than 30 seconds.
• Alarm recovery: When the communication is established again the alarm is recovered.
6.3 Troubleshooting by protection code (Outdoor unit)
Protection
code
P102
LCD controller has no power
• Outdoor unit LED301 blinks 2 times
• This protection code is displayed 3 times before alarm 102 appears at the LCD controller.
Abnormal
Abnormal
Normal
Normal
Yes
No
LD301 blinks twice
Peak current cut
Operation stopped due to the detection of
abnormality by the compressor control. It may be an
abnormality of the compressor and an abnormality
of the drive circuit in case of heavy load.
Check the compressor
for loose connectors and
continuity of the cord.
Is a leakage breaker
installed?
Is the insulation of the compressor
normal? Check it with a megger.
Replace the parts found to be
defective based on the results of
the “self-check” evaluation.
Replace the compressor and
inspect the outdoor electrical
parts.
Fix the point of
abnormality.
Conduct a “self-check”
Protection
code
P103
Abnormal low speed of the compressor
• Outdoor unit LED301 blinks 3 times
• This protection code is displayed 3 times before alarm 103 appears at the LCD controller.
Yes
Abnormal
Abnormal
Normal
Normal
Yes
No
No
LD301 blinks 3 times.
Abnormally slow rotation
Operation stopped due to the detection of
abnormality by the compressor control. It
may be an abnormality of the drive circuit
in case of heavy load.
Is the service valve open?
Check the compressor
for loose connectors and
continuity of the cord.
Is a leakage breaker
installed?
Is the insulation of the compressor
normal? Check it with a megger.
Replace the parts found to be
defective based on the results of
the “self-check” evaluation.
Replace the compressor and
inspect the outdoor electrical
parts.
Fix the point of
abnormality.
Open the service valve
Conduct a “self-check”
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