201703
61
P
art 4 - Diagnosis and T
roubleshoo
ting
4.10 H1 Troubleshooting
Digital display output
4.10.1
Description
4.10.2
Communication error between outdoor unit main control chip and the inverter driver chip.
M-Thermal Split stops running.
Error code H1 is displayed on outdoor unit main PCB and user interface.
Possible causes
4.10.3
Power supply abnormal.
Transformer malfunction.
Interference from a source of electromagnetic radiation.
Outdoor unit main PCB or inverter driven module damaged.
Procedure
4.10.4
H1
Power supply for outdoor unit main PCB
and transformer is abnormal
1
Yes
Provide normal power supply
No
The transformer has malfunctioned
2
Yes
Replace the transformer
No
There is a source of electromagnetic
radiation near the unit, such as
high-frequency transmitter or other high
strength radiation device
Yes
Remove the source of interference
No
Replace outdoor outdoor unit main PCB
and inverter driven module in turn
Notes:
1.
Measure the voltages of transformer input port and on the main PCB. The normal voltage between transformer input port terminals is 220V, between GND
and 18V is 18V. If one or more of the voltages are not normal, the power supply for main PCB and transformer is abnormal.
2.
Measure the voltages of transformer output port ports. If the voltages are not normal, the transformer has malfunctioned.
MUNDOCLIMA AEROTHERM V17 - BIBLOC
