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4. Service procedures
HIC +
Between terminals Resistance
HIC +
HIC +
HIC +
HIC –
HIC –
HIC –
HIC –
U
V
W
U
V
W
Resistance
200 kΩ or more
300 kΩ or more
300 kΩ or more
300 kΩ or more
200 kΩ or more
200 kΩ or more
200 kΩ or more
No
Yes
Replace outdoor unit
control PCB.
(3) [Alarm “E31”]
(communications
trouble within unit)
IGBT short-circuit protection
Is “E31”
displayed even after
the power voltage
is reset?
Normal
HIC-CH4872R
(42 Type)
HIC-CH2672R
(26, 36 Type)
4