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3) Outdoor unit fan does not work or its fan speed changes.
• Is high-temp. release operation control working during heating?
• Is low outside air temperature operation control working during cooling?
• Is defrosting operation going?
4) Operation ON/OFF by remote controller is disabled.
• Is forcible operation OFF mode set?
• Is any remote controller or external control working?
• Is auto address setting in progress?
(At the first power on or when indoor unit address is changed, operation control is disabled for
about 5 minutes after power on.)
B Are all cables/wiring set in the initial state?
C Are indoor unit and receiver unit connected correctly?
(2) Troubleshooting procedure
When an error occurs, check the unit in the following procedure.
(Note) Other than the check items in the table, malfunction or wrong diagnosis of microcomputer
due to effect of power or external noise is considered. If there is any source of noise, shield
the signal lines.
(a) Outline of judgment
The following describes the primary judgment of locating faulty unit (indoor unit or outdoor unit). (In
the case of group control operation, the header unit also indicates errors of follower unit by lamp.)
Judging from lamp status of indoor unit
The indoor unit monitors the operating status of air conditioner. When the protection circuit is
activated, the indoor unit indicates the following self-diagnosis contents.
Error Check indication of lamps Check faulty location and parts
→→
: OFF : ON : Blinking (0.5 seconds interval)
Lamp indication
Check code
–
E04
P12
TIMER PREPARINGOPERATION
TIMER PREPARINGOPERATION
TIMER PREPARINGOPERATION
All OFF
Blinking
Blinking
Invalid setting
Possible causes
Power OFF
Poor connection/contact between receiver/indication unit and
indoor unit control board
Reception error
Transmission error
Communication error
Duplication of indoor unit No.
Duplication of remote controller header
Poor connection/contact between indoor units or indoor unit
power OFF
(Communication error between header and follower indoor
units or between twin header and follower indoor units)
Wrong connection or poor contact between indoor unit and
outdoor unit
(Communication error between indoor and outdoor units)
Failure of indoor unit DC fan (Protection device of indoor unit is
activated.)
Wired remote
controller
Wrong connection or
poor contact between
wired remote controller
and indoor unit
E08
E09
E01
E02
E18
E03
TIMER PREPARINGOPERATION
Alternate blinking
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