Daikin J Series Service Manual Page 210

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  • TROUBLESHOOTING
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SiE18-201 Troubleshooting - SkyAir Indoor Unit
Service Diagnosis 199
2.4 Troubleshooting by LED on the Indoor Unit’s
Foreword Troubleshooting can be carried out by service monitor LED (green). (Blinks when normal)
4 : LED on 3 : LED off 5 : LED blinks — : No connection with troubleshooting
Note: 1. If LED-B is off, the transmission wiring between indoor and outdoor unit may be incorrect or
disconnected. Before performing the previously described troubleshooting, check the
transmission wiring.
2. Troubleshoot by turning off the power supply for a minimum of 5 seconds, turning it back on,
and then rechecking the LED display.
General
Precautions
when Performing
Maintenance
1. When disconnecting the fasten terminal from the PC board, hold down the PC board with
your finger and do not apply excessive force. Also, do not hold the neck of the fasten
terminal and pull the lead wire.
2. Do not use a mega tester on the secondary side (transformer secondary side) of the
electronic circuitry.
3. Even when not energized, beware of static electricity when touching parts or pattern. (If
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.)
Microcomputer
Normal Monitor
Transmission
Normal Monitor
Contents/Processing
H1P (LED-A) H2P (LED-B)
55
Normal Outdoor unit
54
Failure of indoor unit PC board ass’y
3
If outdoor unit’s LED-A blinks, failure of indoor unit PC
board ass’y (Note 1)
4
Failure of indoor unit PC board ass’y (Note 2)
3
Malfunction of power supply or failure of PC board ass’y
(Note 2)
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