51
Installation and Maintenance
Service Manual
9.2 Error Code List
No.
Malfunction
Name
Display Method of Indoor Unit
Display Method of Outdoor
Unit
(Indicator has 3 kinds of
display status and they
will be displayed circularly
every 5s.)
A/C Status Possible Causes Countermeasures
Display
of dual-
8 nixie
tube
Indicator Display (during
blinking, ON 0.5s and OFF
0.5s)
□OFF
■Illuminated
☆
Blink
Operation
Indicator
Cool
Indicator
Heat
Indicator
D40/
D5
D41/
D6
D42/
D16
D43/
D30
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 unit's
main board;
6. Replace outdoor
unit's 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
unit's horizontal
louver can close
normally;
Rotation speed
of indoor fan is
abnormal;
2. Replace indoor
unit's main board→
replace indoor fan
Evaporator is
dirty;
3. Clean
evaporator of
indoor unit;
