Daikin LX10F11B3 Service Manual page 72

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106 E52C
Alarm Inverter board temperature is over-heated (≧90℃ with 260 sec elapse or ≧99℃ with 5 sec
Logic
elapse)
Possible ①Ambient temperature is high （>50℃）
Causes
②Inverter board failure （fin temperature detection part）
③Inverter box is heat up due to less air circulation.
Trouble ①The unit can operate with an ambient temperature of up to 50℃ .
Shooting
Check for a short circuit at the discharge air of the air cooling condenser coil and also check
the surrounding environment. Operation continues if the environment is improved.
② If no external factors are present, the inverter board may have failed. Replace the inverter
board.
③ Clean the fin on the rear of the inverter box and the base of the inverter box to ensure that
the air can circulate.
E52C Restart after 3 minutes
107 E531
Alarm Unbalanced power phase is supplied
Logic
Possible
Abnormal power supply
Causes
Trouble Regardless alarm is generated, restart after 3 minutes standby.
Shooting
Operation continues if the external factor is improved.
E531 Restart after 3 minutes
108 E532
Alarm Voltage in inverter becomes ≧DC790V or ≦DC320V due to power supply voltage≧AC530V or
Logic
≦AC300V.
Possible ①Power supply voltage is at high voltage (≧AC535V), or low voltage (≦AC300V).
Causes
②Inverter board failure (Voltage detection part)
Trouble ①Check if the actual power voltage is within range (300V〜535V）.
Shooting
＊ Provide the power supply within range if it is out of range.
Restart after 3 minutes standby.
Operation continues if the power supply condition is improved.
② If the power voltage is within range, it seems to be inverter board failure. Replace inverter
board.
Controller
E532 Restart after 3 minutes
Action
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