Whether the commercial
pressure switch
is normal
No
88
[E6] Commercial IOL, OL circuit
Whether the
resetting can be conducted
through the button of OL
(manual resetting)
Yes
No
Whether the
power supply is normal
1.Whether the supply voltage is
within 380V*10%;
2.Whether the power connecting terminal of the
commercial compressor has short
circuit and missing phase.
No
Yes
Whether the OL circuit
is normal
1.OL self; 2.OL wiring
Mg-Sw contact connection
No
Replace Mg-Sw
Modify power supply,
wiring.
Repair OL circuit
Whether the
commercial compressor
is normal
1.whether the coil of the compressor is normal
2.whether the compressor
is locked
No
Replace commercial
compressor
Yes
Yes
Overloading running ,
liquid slugging
Whether the
gas pipe, liquid pipe and shutoff
valve of outdoor unit
are all open
No
Fully open shutoff valve
Yes
Whether outdoor
PMV is normal
1.Connection of the connectors;
2.Wiring; 3.Winding; 4.Valve body;
5.Outdoor PC board
No
Repair outdoor PMV
Whether the
IOL loop is normal
1Connection of the connectors; 2.Wiring;
3.Outdoor PCB
No
Yes
Repair IOL circuit
No
Refer to judgingsequence of "E1"
No
Yes
Whether the wiring is correct
Wiring as per regulation
Yes
(Check the function and conduct
confirmation through outdoor unit
mismatching line)
Insufficient refrigerant, block,
refrigerant pipe is bent
(Confirm whether there are block, broken refrigerantpipe. Judge whether the refrigerant is required to addas per the injection rate of the refrigerant)
No
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