Haier H-MRV AF092FCBHA, Service Manual

Page: 189 / 200

Yes
Yes
Replace the mainboard.
4.
Models with wired controller
Models with wireless remote controller
Readout: E5 6 flashes of Timer light.
Description: Transmission error between indoor unit 846 chip and 808 chip.
What to do: Replace the mainboard.
5.
Models with wired controller
Models with wireless remote controller
Readout: E7 5 flashes of Timer light.
Description: Transmission error with electronic expansion valve driver.
No
Yes
Yes
No
Yes
Check if the sensor is properly
connected to the mainboard.
No
Reconnect
Check the sensor resistance
with a multimeter:
R25 =10K
Ω +3%
℃ ；
B(25/50)=3741K+70K
No
Replace the sensor
Check if the electric control of
indoor unit and the electric
control of expansion valve share
the same supply and if live wire
and null wire are properly
connected.
Check if the internal wiring of indoor unit and
expansion valve is properly done. For AE-
FCBKA mainboard, a jumper wire is used to
select the function of wire controller.
Check if the mainboard is noticeably damaged
and if the control panel works properly after
replacement.
Reconnect
Replace the
mainboard
Check if the PCB CN23 of AC series is short
connected.
Remove the
short wire
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