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8-4-2. Outdoor unit failure detection
Diagnosis procedure for each check code
• One check code may indicate multiple symptoms. In such a case, see the LED indication on the outdoor board
to narrow down the check details.
• The handy remote controller displays a check code only when the same failure repeatedly occurs while the LED
on the outdoor board indicates an error even if it occurs only once. This may cause indication inconsistency
between the remote controller and LED.
How to check the LED display on the outdoor PC board
[Service switch operation]
Currently occurring trouble indication
If any of D800 to D804 is rapidly flashing, it indicates currently occurring trouble. If any of D800 to D804 is slowly
flashing or D805 is flashing then press and hold down SW01 and SW02 at the same time for at least 5 seconds.
Currently occurring trouble will be indicated.
: Off : Light : Flash (5 times/sec)
Latest trouble indication
• The following operation results in the latest trouble being indicated. It is retained in the memory and hence can
be confirmed even when the power supply has been turned off.
1) Confirm D800 to D804 are off (or rapidly flashing) and that D805 is lit up. If D800 to D804 are slowly flashing
or D805 is flashing then push and hold down SW01 and SW02 at the same time for at least 5 seconds.
D800 to D804 will turn off (or be rapidly flashing) and D805 will change to on.
2) Push SW01 several times until reaching the LED indication (D800 to D805) of ‘Latest (including current)
trouble indication’.
3) Push SW02. The latest trouble will be indicated.
4) Confirm to carry out step 1) to set the LEDs to the initial state (current occurring trouble) when finished and
then exit.
Latest (including current) trouble indication
: Off : Light : Flash (5 times/sec)
D800 (YEL) D801 (YEL) D802 (YEL) D803 (YEL) D804 (YEL) D805 (GRN)
No trouble
Trouble detected
(Example. Discharge temp. sensor trouble)
(Refer to (2) -1-1.Current trouble indication)
D800 (YEL) D801 (YEL) D802 (YEL) D803 (YEL) D804 (YEL) D805 (GRN)
Trouble detected
(Example. Discharge temp. sensor trouble)
(Refer to (2) -1-2.Latest (including current)
trouble indication)
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