Gree GVH24AK-K3DNC8A - 9 Troubleshooting; Judgement by Flashing LED of Indoor

Service Manual
39
Installation and Maintenance
9.Troubleshooting
9.1 Judgement by Flashing LED of Indoor
No.
Malfunction
Name
Display Method of
Indoor Unit
A/C status Possible Reasons
Dual-8
Code
Display
1
High pressure
protection of system
E1
Cooling: Compressor stops
and indoor fan operates.
Heating: All the loads are stopped.
Overpressure of AC system
2
Antifreezing
protection
E2
Cooling: Compressor stops
and indoor fan operates.
Heating: All the loads are stopped.
Indoor tube temperature is too low under
cooling mode
3
High discharge
temperature
protection of
compressor
E4
Cooling: Compressor stops
and indoor fan operates.
Heating: All the loads are stopped.
Discharge temperature is
too high.
4
Overcurrent
protection
E5
Cooling: Compressor stops
and indoor fan operates.
Heating: All the loads are stopped.
Unit’s overall current is too large.
5
Communi-
cation
Malfunction
E6
Cooling: Compressor stops
and indoor fan operates.
Heating: All the loads are stopped.
Bad communication of outdoors
Bad communication between main board
of indoor unit and display board (display E6
and indoor temp)
6
High
temperature
resistant
protection
E8
Cooling: Compressor stops
and indoor fan operates.
Heating: All the loads are stopped.
Indoor tube temperature is too high
under heating mode
7
Discharge
temperature
sensor of outdoor
unit is not inserted
in copper pipe
U8
Cooling: Compressor stops
and indoor fan operates.
Heating: All the loads are stopped.
Discharge temperature sensor of outdoor
unit is not inserted in copper pipe
8
No feedback
on motor of
indoor unit
H6
9
Indoor ambient
temperature
sensor is
open/short
circuited
F1
Cooling: Compressor stops
and indoor fan operates.
Heating: All the loads are
stopped.
Open circuit or short circuit of indoor
ambient temperature sensor
10
Indoor
evaporator
temperature
sensor is
open/short
circuited
F2
Cooling: Compressor stops
and indoor fan operates.
Heating: All the loads are
stopped
Open circuit or short circuit of
indoor evaporator
11
Outdoor
ambient
temperature
sensor is
open/short
circuited
F3
Cooling: Compressor stops
and indoor fan operates.
Heating: All the loads are
stopped.
Open circuit or short circuit of outdoor
ambient temperature sensor