83
[bE] Protection action of low pressure
Whether the
fan in cool can normally run
No
Whether the
relative indoor fan is normal
1.Connection of the connectors;
2.Capacitor; 3.Motor
No
Yes
Repair improper
portion
Whether the indoor
filter or the heat exchanger is
blocked
Yes
Clean
Yes
Check indoor PC board,
if improper, replace it
No
Yes
Yes
Whether the high
pressure sensor is in the state of back
up running
Replace high pressure sensor
No
Whether the
characteristic of the high pressure
sensor is normal
No
Yes
Whether the outdoor fan in
heat is normal
No
Whether the
relative outdoor fan is normal
1.Connection of the connectors;
2.Capacitor;
3.Motor
No
Repair improper
portion
Whether the
outdoor heat exchanger is
blocked
Yes
Clean
Yes
Check the outdoor
PCB , if improper,
replace it
Whether the gas
pipe, liquid pipe and shutoff valve
are all open
No
Fully open the shutoff valve
Yes
Whether the
characteristic of low pressure
sensor is normal
No
Replace low pressure sensor
Yes
Whether the
SV2 by-pass loop is normal
No
Modify SV2 by-pass loop
Yes
Whether the wiring is correct
No
Wiring as per regulation
Yes
(Check the function and
conduct confirmation throughoutdoor unit mismatching line)
Insufficient refrigerant, block, refrigerantpipe is bent
(Confirm whether there is block, broken refrigerant pipe.Judge whether the refrigerant is required to add as per theinjection rate of the refrigerant)
No
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