Gree GVH24AK-K3DNC8A Service Manual page 45

Malfunction
No.
Name
The four-way
valve is
39
abnormal
Outdoor unit
zero cross
40
error
Outdoor DC fan
41
motor malfunction
Selection port
electrical level
42
is abnormal.
PFC current
offset voltage
43
is wrong.
Pipe covering
middle tube
44
temperature
sensor error
Humidity
45
sensor error
Communication
error between
46
indoor unit and
check board
Radio
frequency
47
module error
Voltage is too
48
high
Outdoor fan
49
phase loss
Outdoor fan
50
nonsynchronism
Phase current
protection frequency
51
limit/ frequency
decrease
Outdoor ambient
temperature is
52
abnormal.
Fan current
sensing circuit
53
error
Peak current
frequency limit
54
or decrease
Fluorine shortage
protection,
refrigerant
55
circulation cut-off
protection.
42
Display
Method of
Indoor Unit
Dual-8
Code
Display
Cooling: Compressor stops
and indoor fan operates.
U7
Heating: All the loads are stopped.
Cooling: Compressor stops
and indoor fan operates.
Heating: All the loads are stopped.
Cooling: Compressor stops
and indoor fan operates.
L3
Heating: All the loads are stopped.
Cooling: Compressor stops
and indoor fan operates.
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.
F4
Heating: All the loads are stopped.
L1 Air conditioner can work normally.
Cooling: Compressor stops
and indoor fan operates.
JF
Heating: All the loads are stopped.
Cooling: Compressor stops
and indoor fan operates.
rF
Heating: All the loads are stopped.
Cooling: Compressor stops
and indoor fan operates.
Heating: All the loads are
stopped.
Cooling: Compressor stops and indoor fan
operates. Heating: All the loads
are stopped.
Cooling: Compressor stops and indoor fan
operates. Heating: All the loads are stopped.
Loads are running normally.
oE
Compressor operating frequency is decreased.
Cooling: Compressor stops and indoor fan
operates. Heating: All the loads are stopped.
Cooling: Compressor stops and
indoor fan operates. Heating: All the loads are
stopped.
Loads are running normally.
Compressor operating frequency is decreased.
Cooling: Compressor stops
and indoor fan operates.
F0
Heating: All the loads are stopped.
A/C status Possible Reasons
4-way valve doesn't change direction under
heating mode.
Outdoor unit sensing AC
power zero cross circuit is
ineffective.
Outdoor fan error.
Model's selection port
electrical level is abnormal.
PFC current offset voltage
is wrong.
Pipe covering middle tube
temperature sensor error
Humidity sensor error
Communication error
between indoor unit and check board
Radio frequency module error
DC voltage after power
rectification is too high.
Outdoor fan power phase
loss.
Outdoor fan non-synchronism
Compressor phase current
is too large.
Outdoor ambient
temperature is too high or
too low.
Fan current sensing circuit
is abnormal.
PFC peak current is too large.
Air conditioner is short of
fluorine. Valve doesn't
open. System is blocked.
Installation and Maintenance
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