Gree GVC36ALXH-K3NTC7A Service Manual page 49

9. Maintenance
High discharge
temperature
8
protection of
compressor
Overcurrent
9
protection
Communication
10
malfunction
Overload
11
malfunction
In defect of
12
refrigerant
46
During cooling and drying
operation, compressor and
ODU fan motor stop while
E4
IDU fan motor operates.
During heating operation,
all loads stop.
During cooling and drying
operation, compressor and
ODU fan motor stop while
E5
IDU fan motor operates.
During heating operation,
all loads stop.
During cooling and drying
operation, compressor
and outdoor fan stop while
E6 indoor fan operates. During
heating operation, all loads
stop.
E8 The entire unit stops.
The Dual-8 Code Display
will show
F0
F0 and the complete unit
stops.
1. The system is abnormal. (e.g.:
blockage, etc)
2. Abnormal rotation speed of outdoor
motor (cooling );
3. Abnormal outdoor air intake (cooling);
4. System is normal, but the compressor
discharge temperature sensor is broken
or poorly contacted (Please check it
by referring to the resistance table for
temperature sensor).
1. Unstable supply voltage. Normal
fluctuation shall be within 10% of the
rated voltage on the nameplate;
2. Supply voltage is too low and load is
too high;
3. Measure the current of live wire on
mainboard. If the current isn't higher than
the overcurrent protection value, please
check the mainboard;
4. The indoor and outdoor heat
exchangers are too dirty, or the air inlet
and air outlet are blocked;
5. The fan speed of fan motor is too low
or the fan motor doesn't run;
6. The compressor is not running
normally. There is abnormal sound, oil
leakage or the temperature of the shell is
too high, etc;
7. There's blockage in the system (filth
blockage, ice blockage, greasy blockage
or valve hasn't been opened completely).
See 9.2 (Communication malfunction)
1. Indoor and outdoor heat exchanger is
too dirty?
Or air inlet/outlet is blocked?
2. Fan motor doesn't work at a normal
fan speed;fan speed is too low or the fan
doesn't run.
3. Compressor operates normally or not?
Is there any abnormal noise or oil leak?
Casing is too hot?
4. System is blocked inside? (Dirt
blockage? Ice blockage?
Oil blockage? Y-valve is not fully open?)
5. Main board temperature sensor detects
wrongly.
1. In defect of refrigerant;
2. Indoor evaporator temperature sensor
works abnormally;
3. The unit has been plugged up
somewhere.
Service Manual
Refer to Malfunction
Detection Flowchart
Refer to Malfunction
Detection Flowchart
Refer to maintenance
flowchart
Refer to Malfunction
Detection Flowchart
Refer to Malfunction
Detection Flowchart
Installation and Maintenance