Gree GVH24AK-K3DNC8A Service Manual page 44

Service Manual
Malfunction
No.
Name
Module high
25 temperature
protection
Malfunction of module
26 temperature
sensor circuit
Desynchron-
27 izing of
compressor
Overcurrent
protection of
28
phase current for
compressor
Malfunction of phase
current
29
detection circuit for
compressor
30 Failure start-up
31 PFC protection
EEPROM
32
malfunction
Charging
33 malfunction of
capacitor
Malfunction of voltage
34 dropping for
DC bus-bar
Voltage of DC bus-bar
35
is too low
Voltage for DC bus-bar
36
is too high
Limit/decrease
37 frequency due to high
temperature of module
Unit's overall
current sensing
38
error
Installation and Maintenance
Display
Method of
Indoor Unit
Dual-8
Code
Display
Cooling: Compressor stops
and indoor fan operates.
P8
Heating: All the loads are
stopped.
Cooling: Compressor stops
and indoor fan operates.
P7
Heating: All the loads are stopped.
Cooling: Compressor stops
and indoor fan operates.
H7
Heating: All the loads arestopped.
Cooling: Compressor stops
and indoor fan operates.
P5
Heating: All the loads are stopped.
Cooling: Compressor stops
and indoor fan operates.
U1
Heating: All the loads are stopped.
Cooling: Compressor stops
and indoor fan operates.
LC
Heating: All the loads are stopped.
Cooling: Compressor stops
and indoor fan operates.
HC
Heating: All the loads are stopped.
Cooling: Compressor stops
and indoor fan operates.
EE
Heating: All the loads are stopped.
Cooling: Compressor stops
and indoor fan operates.
PU
Heating: All the loads are stopped.
Cooling: Compressor stops
and indoor fan operates.
U3
Heating: All the loads are stopped.
Cooling: Compressor stops
and indoor fan operates.
PL
Heating: All the loads arestopped.
Cooling: Compressor stops
and indoor fan operates.
PH
Heating: All the loads are
stopped.
Loads are running normally.
Compressor operating
EU
frequency is decreased.
Cooling: Compressor stops
and indoor fan operates.
U5
Heating: All the loads are
stopped.
A/C status Possible Reasons
Module temperature is too
high.
Open-circuit or
short-circuit of module
temperature thermal
resistance
Compressor
non-synchronism
Compressor's current is too
large
Compressor current
sensing circuit is not
effective.
Compressor startup is
defective.
PFC over-current
protection
Outdoor unit reads
EEPROM data wrongly.
Electrolytic capacitor
charge up circuit is
disabled.
Alternating current
decreases a lot instantly.
DC voltage after power
rectification is too high.
DC voltage after power
rectification is too high.
Module temperature is too
high.
Unit's overall current
sensing circuit is not
effective.
41