60
Installation and Maintenance
Service Manual
No.
Malfunction
Name
Display Method of Indoor Unit
A/C Status Possible Causes Countermeasures
Display
of dual-
8 nixie
tube
Indicator Display
(during blinking, ON
0.5s and OFF 0.5s)
Operation
Indicator
Heat
Indicator
1
High pressure
protection
E1
Flash
once
every 3s
During cooling and drying
operation, compressor and
outdoor fan stop while indoor
fan operates. During heating
operation, all loads stop.
Refrigerant is
superabundant;
1. Reduce refrigerant
volume;
Poor heat-
exchanging (including
heat exchanger is
dirty and radiating
environment is not
good);
2. Clean the heat
exchanger; improve
radiating environment
of unit;
Ambient temperature
is too high;
3. Reduce load
Poor connection of
LPP;
4. After de-energization,
reinsert LPP terminal
tightly;
Pressure switch is
damaged;
5. Replace pressure
switch;
Hardware malfunction
of outdoor units main
board;
6. Replace outdoor
units main board;
2
Freeze
protection
E2
Flash
twice
every 3s
During cooling and drying
operation, compressor and
outdoor fan stop while indoor
fan operates. During heating
operation, all loads stop.
Poor air return of
indoor unit;
1. Check whether indoor
units horizontal louver
can close normally;
Rotation speed
of indoor fan is
abnormal;
2. Replace indoor units
main board→ replace
indoor fan
Evaporator is dirty;
3. Clean evaporator of
indoor unit;
9. Maintenance
9.1 Error Code List
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