Haier H-MRV Series Service Manual page 66

7.1.10 Electrical wiring
1. The system uses one two-core communication wire, all of the indoor communication wires
are connected to this wire in parallel. "C1", "C2" are non-polar, when wiring, please pay
attention that they must be separate with the power wire, in order not to make the
interfering signal.
2. When pressing the power wire, please pay attention that the interior diameter of loop
terminal should be more thanφ5.5, in order not to press it firmly.
3. The max. current can be up to 42A, and power can be up to 7.5KW. So when selecting the
electric parts and air breaker, the data should be 1.5 times than the nominal.
4. Because the indoor unit adopts EEV control method, when a sudden power off occurs, the
EEV maybe keep some angle. If indoor unit and outdoor unit connect to power supply
separately, when some indoor units running in cooling mode, when powered off, because
the EEV does not reset, the indoor units maybe drop water, ice up. We recommend that the
indoor unit connect to power supply from the outdoor unit, or use one power supply with the
outdoor unit. If the indoor unit need connect power supply individually, the personnel must
explain to the customer that he (she) must switch off the unit with wired controller or remote
controller, then he (she) can shut off the indoor unit. If there is accidental power failure,
please firstly power on all the indoor units after power on, in order to reset the indoor EEV.
Specification for selecting wiring and circuit breaker on field:
Type Power wire
H05RN-F
AU482FIBHA 3 x 10mm
AU48NFIBIA 5 x 4mm
Type Power wire
YZW
AU242FHBHA 3 x 2.5mm
Power wire (connecting
to unit)
H05RN-F
2 2
3x(1~1.5mm )
2 2
3x(1~1.5mm )
Power wire
(connecting to unit)
YZW
2 2
3x(1~1.25mm )
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Communication wire
(connecting to unit)
Shielding wire
2
2x(0.5~1mm )
2
2x(0.5~1mm )
Communication wire
(connecting to unit)
Shielding wire
2
2x(0.75~1.25mm )
Short circuit
protector
75A
20A
Short circuit
protector
30A