45
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
□OFF
■Illuminated
☆
Blink
D40/D5
D41/D6 D42/D16 D43/D30
1
Freeze
protection
E2
■
□
■
□
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;
2
High discharge
temperature
protection of
compressor
E4
■
□
■
☆
During
cooling
and drying
operation,
compressor
and outdoor
fan stop while
indoor fan
operates.
During
heating
operation, all
loads stop.
See 9.3
(diagnosis of
overheating
prevention
and overload
protection)
Refer to
maintenance
flowchart
