Troubleshooting By Led On The Indoor Unit's - Daikin FTX25JVEA9 Service Manual

Troubleshooting - SkyAir Indoor Unit
2.4

Troubleshooting by LED on the Indoor Unit's

Foreword Troubleshooting can be carried out by service monitor LED (green). (Blinks when normal)
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Note: 1. If LED-B is off, the transmission wiring between indoor and outdoor unit may be incorrect or
2. Troubleshoot by turning off the power supply for a minimum of 5 seconds, turning it back on,
General 1. When disconnecting the fasten terminal from the PC board, hold down the PC board with
Precautions
when Performing
2. Do not use a mega tester on the secondary side (transformer secondary side) of the
Maintenance
3. Even when not energized, beware of static electricity when touching parts or pattern. (If
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: LED on : LED off
Microcomputer Transmission
Normal Monitor Normal Monitor
H1P (LED-A) H2P (LED-B)
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5
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disconnected. Before performing the previously described troubleshooting, check the
transmission wiring.
and then rechecking the LED display.
your finger and do not apply excessive force. Also, do not hold the neck of the fasten
terminal and pull the lead wire.
electronic circuitry.
handling PC board when dry [winter], be sure to discharge the electrostatic charge by
grounding. Do not touch any other grounded metal parts with your fingers.)
: LED blinks — : No connection with troubleshooting
Normal → Outdoor unit
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Failure of indoor unit PC board ass'y
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If outdoor unit's LED-A blinks, failure of indoor unit PC
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board ass'y (Note 1)
— Failure of indoor unit PC board ass'y (Note 2)
Malfunction of power supply or failure of PC board ass'y
(Note 2)
Contents/Processing
Service Diagnosis
Si18-201