H-Mrv Indoor Unit Troubleshooting - Haier H-MRV Series Service Manual

H-MRV indoor unit troubleshooting:

1.
Models with wired controller
Fault code readout: E0
Fault description: The float switch or pump motor is broken.
Check if the switch and
pump connector are in
good condition?
Yes
Check if the float switch
is open?
No
Replace the indoor
PC board
2.
Models with wired controller
Fault code readout: E1
Fault description: Failure in outdoor unit
Faults in models with remote controller can be identified by the number of flashes made by fault indicator
of outdoor unit. Check in accordance with the list of fault codes.
3.
No. Models with wired controller
1 Readout: E3
2 Readout: E4
3 N/A
1 Description: Liquid line temperature sensor (Ti) is short-circuit or open-circuit.
2 Description: Suction line temperature sensor (T0) is short-circuit or open-circuit.
3 Description: Ambient temperature sensor is short-circuit or open-circuit.
Models with wireless remote controller
11 flashes of Timer light.
No
Repair
Yes
Check if the pump is
running?
No
Check if the
pump is power-
on?
Yes
Replace the
pump
Models with wireless remote controller
The Operation light flashes.
Check in accordance with the list of outdoor
fault codes.
Models with wireless remote controller
1 flash of Timer light.
2 flashes of Timer light.
3 flashes of Timer light.
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Yes
Check if the drain
system is clogged or
the float switch is stuck.
Clean the drain system
and reconnect the
switch.
Yes