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YES
NO
Is CN600 connection normal?
Is resistance value of TE sensor normal?
Correct connector.
Sensor error → Replace
Check outdoor P.C. board.
Defect → Replace
YES
NO
Is CN601 connection normal?
Is resistance value of TD sensor normal?
Correct connector.
Sensor error → Replace
Check outdoor P.C. board.
Defect → Replace
Check Item code [14].
Correct wiring
of terminal blocks.
Check outdoor P.C. board.
Defect → Replace
Correct wiring
and inter-unit cable.
YES
YES
YES
NO
NO
NO
Is setting of group address of remote controller correct?
Are inner wiring and inter-unit cables (1, 2, 3) normal?
Is wiring of terminal blocks (1, 2, 3) normal?
10-2-10. Diagnostic Procedure for Each Check Code (Outdoor Unit)
• This section describes the diagnostic method for each check code displayed on the remote controller.
In some cases, a check code indicates multiple symptoms.
Check code
[E04]
Check and troubleshooting
(Item without special mention Indicates part of outdoor unit.)
[Indoor/Outdoor communication error]
[Discharge temp. sensor (TD) error][F04]
[F06]
YES
NO
Is CN602 connection normal?
Is resistance value of TO sensor normal?
Correct connector.
Sensor error → Replace
Check outdoor P.C. board.
Defect → Replace
[F08] [Outside air temp. sensor (TO) error]
[Heat exchanger temp. sensor (TE) error]
<In case of SP40, SP45>