6 Troubleshooting
Outdoor unit
SMGB0135 rev.0 - 06/2020
67
6
6.1.5 Checking the refrigerant cycle
Connect U, V, W phase leads to the
power module again and operate the
DHW tank.
The compressor is defective. Replace it and seal
refrigerant.
Checking the IPM (main PCB)
Blinking
O
Outdoor air temperature
(ºC)
Selfdiagnosis
lamp
Blinks
2 times
LD301
Time until the
lamp lights
Compressor
Approx. 10 seconds
Approx.
10
seconds
Approx.
10
seconds
Within
Approx.
30
seconds
Compressor
Gas
leakage
Possible
malfunctioning
part
Blinks
3 times
Blinks
4 times
Blinks
5 times
Blinks
6 times
Blinks
8 times
Lighting mode
Charge port pressure
MPa (G) (kgf/cm
2
(G))
Is the self-diagnosis lamp mode as shown
on the right?
Stop to operate and check the
gas pressure in balancing mode.
(R32)
The values above are the theoretical ones.
Gas leaks. Repair and seal
refrigerant.
When the self-
diagnosis lamp lights
in the same condition
as above.
Perform a nal check of operation.
Yes
Normal
Error (Gas leaking)
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