Daikin LX10F11B3 User Manual

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029 Communication Interrupted
（E903）
Alarm
Logic
A communication error between CPU board and operation board
Possible
Causes
1. Open circuit between operation board (EC3) and CPU board (EC1)
2. Operation board failure
3. CPU board failure
Trouble
Shooting
Step 1. Check if the connector of cable between operation board （EC3) and CPU board （EC1)
is inserted securely.
Step 2. If there is no connection error between both boards, it seems to be operation board or
CPU board failure.
Replace in order starting from the CPU board.
Controller
Action
Communication Interrupted（E903） Alarm display only
（"Communication Interrupted" is displayed on LCD and E903 is recorded on trip report.)
030 F106・ E106
Alarm
Logic
Abnormal compressor operation
Possible
Causes
Wiring connection mistake between the compressor and the inverter board (EC8)
Trouble
Shooting
Step 1. Check the colors of the wires connected to U, V, and W on the inverter board (EC8).
(U - red, V - white, W - black)
Step 2. Check the colors of the wires connected to U, V, and W in the compressor terminal box.
(U - red, V - white, W - black)
(Refer to paragraph 4.8.1 Parts Replacement, Compressor .)
Step 3. After checking the wiring in the above steps, if an alarm occurs, replace the compressor.
Controller
Action
F106 Unit stop.
E106 Restart after 3 minutes of standby
031 E441
Alarm
Logic
CPU board (EC1) temperature sensor failure
Possible
Causes
The internal temperature sensor of the CPU board (EC1) is malfunctioning.
Trouble
Shooting
Replace the CPU board (EC1).
Controller
Action
E441 Backup operation
02章19-44LX10F11B3TR16-02En.indd2-3902章19-44LX10F11B3TR16-02En.indd2-39 2016/02/0217:17:412016/02/0217:17:41
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Daikin LX10F11B3 Specifications

General

Brand	Daikin
Model	LX10F11B3
Category	Inverter
Language	English