Gree GWH18TC-S3DNA1D Service Manual page 66

Service Manual
Outdoor
condenser
temperature
11 F4
sensor is
open/short
circuited
Outdoor
discharge
temperature
12 F5
sensor is
open/short
circuited
Voltage for
13 DC bus-bar PH
is too high
Malfunction
of complete
14 U5
units current
detection
Overcurrent
protection of
15 phase P5
current for
compressor
Heating
indicator
off for 0.5s
16 Defrosting
and then
blinks for
10s
Overload
17 protection for H3
compressor
IPM
18 H5
protection
PFC
19 HC
protection
Desynchron-
20 izing of H7
compressor
Failure start-
21 LC
up
Malfunction
of phase
current
22 U1
detection
circuit for
compressor
EEPROM
23 EE
malfunction
Charging
24 malfunction PU
of capacitor
Installation and Maintenance
During cooling and drying
operation, compressor 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 indoor fan will operate;
☆ ☆
During heating operation, the
complete unit will stop after
operating for about 3 mins.
During cooling and drying
operation, compressor will stop
□ ■ □ while indoor fan will operate;
☆
During heating operation, the
complete unit will stop operation.
During cooling and drying
operation, the compressor will
□ ■ ■ stop while indoor fan will operate;
☆
During heating operating, the
complete unit will stop operation.
During cooling and drying
operation, compressor will stop
□ □ □ while indoor fan will operate;
☆
During heating operation, the
complete unit will stop operation.
Defrosting will occur in heating
mode. Compressor will operate
while indoor fan will stop
operation.
During cooling and drying
operation, compressor will stop
□ □ while indoor fan will operate;
☆ ☆
During heating operation, the
complete unit will stop operation.
During cooling and drying
operation, compressor will stop
□ □ ■ while indoor fan will operate;
☆
During heating operation, the
complete unit will stop operation.
During cooling and drying
operation, compressor will stop
□ ■ while indoor fan will operate;
☆ ☆
During heating operation, the
complete unit will stop operation.
During cooling and drying
operation, compressor will stop
□ ■ while indoor fan will operate;
☆ ☆
During heating operation, the
complete unit will stop operation.
During cooling and drying
operation, compressor will stop
□ □ while indoor fan will operate;
☆ ☆
During heating operation, the
complete unit will stop operation.
During cooling and drying
operation, compressor will stop
□ ■ □ while indoor fan will operate;
☆
During heating operation, the
complete unit will stop
During cooling and drying
operation, compressor will stop
□ □ □ ■ while indoor fan will operate;
During heating operation, the
complete unit will stop
During cooling and drying
operation, compressor will stop
□ ■ □ ■ while indoor fan will operate;
During heating operation, the
complete unit will stop
Outdoor temperature sensor hasnt been connected
well or is damaged. Please check it by referring to the
resistance table for temperature sensor)
1. Outdoor temperature sensor hasnt been connected
well or is damaged. Please check it by
referring to the resistance table for temperature sensor)
2. The head of temperature sensor hasnt been inserted
into the copper tube
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 its
normal, theres malfunction for the circuit, please replace
the control panel (AP1)
Theres circuit malfunction on outdoor units control panel
AP1, please replace the outdoor units control panel AP1.
Refer to the malfunction analysis (IPM protection, loss
of synchronism protection and overcurrent protection of
phase current for compressor.
Its the normal state
1. Wiring terminal OVC-COMP is loosened. In normal
state, the resistance for this terminal should
be less than 1ohm.
2. Refer to the malfunction analysis ( discharge
protection, overload)
Refer to the malfunction analysis (IPM protection, loss
of synchronism protection and overcurrent protection of
phase current for compressor.
Refer to the malfunction analysis
Refer to the malfunction analysis (IPM protection, loss
of synchronism protection and overcurrent protection of
phase current for compressor.
Refer to the malfunction analysis
Replace outdoor control panel AP1
Replace outdoor control panel AP1
Refer to the part three—charging malfunction analysis of
capacitor
63