Flow Charts For Troubleshooting; Problems Without Error Codes - Daikin GYEQ20AN Service Manual

SiAUY361411EA

2. Flow Charts for Troubleshooting

2.1

Problems without Error Codes

1
Unit Fails To Start
Flow chart
Unit Fails To Start
Is Unit Powered ON?
YES
Is operation mode RUN
on the Main Circuit
Board?
YES
Is RUN Lamp on
Remote Controller Lit?
YES
Are Communications
Between Outdoor And
Indoor Units Established?
YES
Is There Difference ( T)
Between Intake Temperature And
Temperature Set-Point?
YES
Are You Sure Outdoor Unit
Main Circuit Board, Indoor Unit,
And Remote Controller Show
No Errors?
YES
Are You Sure Actual Outside
Temperature within Operation
Range?
YES
Check/Replace the Outside
temperature sensor.
Troubleshooting
Check Power Supply
NO
Connections For Outdoor
And Indoor Units.
NO
Change the SW1 to RUN.
NO
Check Remote Controller
Connections.
Wait Until Communications
NO
Are Established, Or
Perform Rewiring.
NO
Change Remote Controller
Temperature Set-Point.
NO
Identify Failure And
Take Corrective Actions.
Check the temperature of
NO
operation range.
(Please refer to Part 3
Control and Functionality.)
Flow Charts for Troubleshooting
025861-00E
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