Gree 4LIV30HP230V1A Service Manual page 48

9. Maintenance
Service Manual
No. Malfunction Name
Outdoor condenser
14 temperature sensor is
open/short circuited
Outdoor discharge
16 temperature sensor is
open/short circuited
Limit/decrease frequency
17
due to overload
Decrease frequency due
18
to overcurrent
Decrease frequency due
19
to high air discharge
Limit/decrease frequency
20
due to antifreezing
Voltage for DC bus-bar is
21
too high
Voltage of DC bus-bar is
22
too low
Compressor Min
23
frequence in test state
Compressor rated
24
frequence in test state
Compressor maximum
25
frequence in test state
Compressor intermediate
26
frequence in test state
Overcurrent protection of
27 phase current for
compressor
Charging
28 malfunction of capacitor
Installation and Maintenance
Display Method of
Indoor Unit
Dual-8 Code
Display
During cooling and drying operation, compressor
F4 stops while indoor fan will operate; During heating
operation, the complete unit will stop operation.
During cooling and drying operation, compressor
will sop after operating for about 3 mins, while
F5 indoor fan will operate;
During heating operation, the complete unit will
stop after operating for about 3 mins.
All loads operate normally, while operation
F6
frequency for compressor is decreased
All loads operate normally, while operation
F8
frequency for compressor is decreased
All loads operate normally, while operation
F9
frequency for compressor is decreased
All loads operate normally, while operation
FH
frequency for compressor is decreased
During cooling and drying operation, compressor
will stop while indoor fan will operate;
PH
During heating operation, the complete unit will
stop operation.
During cooling and drying operation, compressor
will stop
PL while indoor fan will operate;
During heating operation, the complete unit will
stop
P0
P1
P2
P3
During cooling and drying operation, compressor
will stop while indoor fan will operate;
P5
During heating operation, the complete unit will
stop operation.
During cooling and drying operation, compressor
will stop while indoor fan will operate;
PU
During heating operation, the complete unit will
stop
A/C status
Outdoor temperature sensor hasn't been
connected well or is damaged. Please check it by
referring to the resistance table for temperature
sensor)
1.Outdoor temperature sensor hasn't been
connected well or is damaged. Please check it by
referring to the resistance table for temperature
sensor)
2.The head of temperature sensor hasn't been
inserted into the copper tube
Refer to the malfunction analysis (overload, high
temperature resistant)
The input supply voltage is too low;
System pressure is too high and overload
Overload or temperature is too high;
Refrigerant is insufficient;
Malfunction of electric expansion valve (EKV)
Poor air-return in indoor unit or fan speed is too
low
1. Measure the voltage of position L and N on
wiring board (XT), if the voltage is higher than
265VAC, turn on the unit after the supply voltage
is increased to the normal range.
2.If the AC input is normal, measure the voltage
of electrolytic capacitor C on control panel (AP1),
if it's normal, There's malfunction for the circuit,
please replace the control panel (AP1)
1. Measure the voltage of position L and N on
wiring board (XT), if the voltage is higher than
150VAC,
turn on the unit after the supply voltage is
increased to the normal range.
2.If the AC input is normal, measure the voltage
of electrolytic capacitor C on control panel (AP1),
if it's normal, There's malfunction for the circuit,
please replace the control panel (AP1)
Showing during min. cooling or min. heating test
Showing during nominal cooling or nominal
heating test
Showing during max. cooling or max. heating test
Showing during middle cooling or middle heating
test
Refer to the malfunction analysis (IPM protection,
loss of synchronism protection and overcurrent
protection of phase current for compressor.
Refer to the part three—charging malfunction
analysis of capacitor
Possible Causes
45