Daikin LX10F11B Service Manual page 72

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109 E533
Alarm ①Power supply voltage ≧AC530V or ≦AC300V.
Logic
②One of phase is open at power supply to inverter.
Possible ①Power supply voltage is too high (≧ AC 530V) or too low (≦ AC 300V).
Causes
② Check if there is broken wire (open) or open phase at the power supply for inverter
(secondary side of circuit breaker).
Trouble ①Power supply check
Shooting
Check if the power supply voltage is within
range （AC300V〜AC530V).
② Check if there is a broken wire (open)
between L1B, L2B and L3B (INV board) at
the secondary side of the circuit breaker.
Controller
E533 Restart after 3 minutes
Action
110 E542
（LX10F15A only）
Alarm
DC fan motor failure
Logic
Possible ①Fan motor for cooling is lock or faulty cable connection
Causes
②Inverter failure
Trouble ①Check if fan motor for cooling is lock or faulty cable connection (open or short circuit)
Shooting
②Replace Inverter board if DC fan motor and wiring of DC fan are no failure.
Controller
E532 Alarm display only
Action
111 Communication Interrupted
Alarm
E5FF: Communication error between CPU board and inverter board during operation
Logic
Possible ①Cable fault or connection error between inverter board and CPU board
Causes
②Inverter board failure (Communication part to CPU board)
③CPU board failure (Communication part to inverter board)
④Noise filter board failure
Trouble Step 1. Set the circuit breaker to ON (UNIT OFF), and then measure the voltage at the inverter
Shooting
board (terminals L1B, L2B and L3B).
1.1 If there is no power voltage, check the power supply line including the noise filter board.
1.2 If there is power voltage but the LED (green) on the inverter board is not flashing,
replace the inverter board.
Step 2. Disconnect the connectors between the CPU board (connector X19A) and the inverter
board (connector X4A), and visually check the connector pins. After checking if any
cables are open or short circuited, securely insert the sockets.
Step 3. Replace the inverter board or CPU board.
Controller Communication Interrupted（E5FF） Restart after 3 minutes
Action
（"Communication Interrupted" is displayed on LCD and E903 is recorded on trip report.
① Provide the power supply voltage within
range.
Electrical parts may have damages.
② Repaire as needed
（E5FF）
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