SELF-DIAGNOSIS LIGHTING MODE
PROCEDURE OF REFRIGERANT PUMP
DOWN OR INDEPENDENT OPERATION
1. CUT OFF THE POWER SOURCE
2. WAIT 1 MINUTE AT LEAST.
3. PRESS THE SERVICE SWITCH
(WHICH IS ON THE PWB) MORE
SERVICE OPERATION WILL BE
TO STOP THIS OPERATION, PRESS
THE SERVICE SWITCH AGAIN (MORE
IN ORDER TO PROTECT THE DAMAGE
OF COMPRESSOR, DO NOT OPERATE
MORE THAN 5 MINUTES WITH
TO RESUME TO NORMAL OPERATION,
CUT THE POWER SOURCE ONCE THEN
SELF−DIAGNOSIS LIGHTING MODE
OUTDOOR UNIT IS EXPOSED TO DIRECT
OUTDOOR UNIT IS EXPOSED TO DIRECT
1
OUTDOOR UNIT IS EXPOSED TO DIRECT
1
SUNLIGHT OR ITS AIRFLOW BLOCKED.
THE VOLTAGE IS EXTREMELY LOW.
LOWER SPEED THAN MINIMUM
READ THE DATA IN EEPROM.
CABLE IS WRONG CONNECTED
CIRCUIT OF BETWEEN INDOOR
CABLE IS WRONG CONNECTED
Remove the compressor connector.
If your first attempt
fails, wait 3 minutes
(for the unit to re
-
start) and check the
self-diagnosis lamp
status again.
Check outdoor electrical parts.
Check the refrigerating
cycle.
Normal
No
Yes
• Check the drive
circuit (IMP) using
the PRD checker
.
• Check the position
sensor circuit.
With the unit set in the operating
state, press the start/stop
button.
Does the unit operate for
approximately 2 seconds (the
LD303 coming on) and then
stop due to a failure of switching
(the lamp blinking 4 times)?