Service manual

3 – 2
✩1 The outdoor unit restarts four times before the indoor unit error is displayed (complete shutdown).
[2] TROUBLESHOOTING GUIDE
1. SELF-DIAGNOS IS FUNCTION AND DISPLAY MODE
1) To call out the content of the self-diagnosis memory, hold down the emergency operation button for more than five seconds when the indoor unit is
not operating.
a) According to the content of the self-diagnosis memory, the Operation LED (main category) and the Plasmacluster Ion LEDs (sub-category)
flash in sync with the Timer LED on the indoor unit.
b) In the event a complete shutdown occurs due to a malfunction, the Operation LED (red), Timer LED (yellow), Plasmacluster Ion LED (blue)
flash to indicate the general information of the generated malfunction.
c) If the power cord is unplugged from the AC outlet or the circuit breaker is turned off, the self-diagnose is memory loses the stored data.
2) Display of detailed self-diagnosis result with main category and sub-category indications When malfunction information is called out, the main cat-
egory and sub-category of the self-diagnose is result are indicated by the Operation, Timer, and Plasmacluster Ion LEDs on the indoor unit.
14
Power factor mod-
ule (Active Filter)
clock error
When power source frequency cannot be
determined (at startup) or when power
source clock can not be detected for 1 con-
tinuous second (at startup).
At compressor
start up, when in
operation.
Compressor continues
operation without stop-
ping.
None Yes Yes
15
Outdoor unit DC fan
error
Operation stops if there is no input of rotation
pulse signal from outdoor unit fan motor for
30 seconds.
When outdoor
unit fan is in
operation.
Operation OFF or ON. Yes ✩1Yes Yes
16
DC compressor
rotation error
Operation stops if rotation of compressor is
abnormal.
During compres-
sor operation
Automatically restarts
after safety time.(180
sec.)
8 times Yes Yes
17
IPM overheat pre-
vention control.
IPM high tempera-
ture error
The compressor stops if the temperature of
Heat sink exceeds 90°C.
During compres-
sor operation
Automatically restarts
after safety time.(180
sec.)
No limit No No
18 Thermal fuse error
When thermal fuse in the outdoor terminal
board below.
Operation OFF 1 times Yes Yes
NO. Function Operation
Description Detection time Restart condition Restart
time
In
door
Out
door
The self-diagnosis display function of the outdoor unit indicates the error information by flashing LED1 on the
outdoor unit according to the content of self-diagnosis.
The self-diagnosis display function of the outdoor unit is active only for about 3 to 10 minutes after self-diagnosis is
performed during operation, and the display returns to normal condition after this display period.
The content of self-diagnosis cannot be called out by the self-diagnosis display function of the outdoor unit.
*1: Example of self-diagnosis result displayed on indoor unit: Suction thermistor open-circuit error
Timer LED [yellow]
ON
OFF
Basic flashing cycle due to error 1 sec 1 sec 1 sec 5 sec
Figures in ( ) indicate numbers (binary notation) assigned based on the flashing sequence.
Flashing for main category indication
Flashing for sub-category indication
ON
OFF
Operation LED [red]
Plasmacluster Ion LED [blue]
Malfunction No.
Main category Sub-category
Example of self-diagnosis display on outdoor unit : Compressor high-temperature abnormality
0.5 sec 0.5 sec 0.5 sec 0.5 sec 0.5 sec 0.5 sec 0.5 sec 0.5 sec 0.5 sec 0.5 sec0.5 sec 0.5 sec 0.5 sec
ON
OFF
*2: