Over Current Protection: Outdoor Led302 Flashes 6 Times - Haier H-MRV Series Service Manual

4. Over current protection: outdoor LED302 flashes 6 times

Is supply voltage good?
Lack of phase?
yes
no
Are connectors in
good condition?
yes
Is actual compressor current detected
by ammeter or test board (0010451601)
above protection limit 16.9A?
yes
1. Is output voltage among U, V and
W balanced?
2. Disconnect all terminals. Is
resistance between P and N; P and
U, V, W; N and U, V, W acceptable?
yes
Is pressure acceptable?
yes
Is compressor in good condition?
yes
Is 3-phase rectifier in good
condition?
yes
Is electrolytic capacitor
for filtration in good
condition?
yes
Check mainboard and make
necessary replacement
no
Modify power supply circuit
Check and reconnect
no
Wrong report. Replace
0010451971 or 0010451530
no
Replace power module
Check: 1. Is a valve in system close?
2. Is piping clogged;
3. Is system overfed; is there air in system;
no
4. (Cooling cycle) Is condenser dirty? Does outdoor fan motor run at
low speed or stop?
5. (Heating cycle) Is evaporator or filter dirty? Does indoor fan motor
run at low speed or stop?
no
Is compressor winding resistance
acceptable? Is it stuck?
1.Check if resistance between rectifier+, L1L2L3; and - L1L2L3
no
complies with diode characteristics.
2. Measure + and - terminals of CN201. Measure voltage between P
and N, which should be 530VDC at 380VAC
Check capacitance and
no
conductivity and make
necessary replacement
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