Daikin LX10F11B3 Service Manual page 55

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006 F703
Alarm
The waveform of power supply is abnormal, therefore phase is not detected correctly.
Logic
Possible
Abnormal waveform of power supply
Causes
Trouble Check power supply equipment or facility and provide power supply with correct phase wave
Shooting form
Controller
F703 Unit stop
Action
007 F705
Alarm
One of R, S, T phase is open (F701 is also generated when S phase is open.)
Logic
Possible 1. Abnormal power supply (Open phase)
Causes 2. Broken wire (open) at power plug or power cable
3. Wire disconnection at unit
Trouble 1. Check if there is open phase on power from power
Shooting supply equipment side
2. Check if there is Broken wire (open) at power plug or
power cable (the primary side of circuit breaker)
3. Check if there is broken wire (open) at the secondary
side of circuit breaker
＊Between C/B〜X63A (PT/CT board)
Controller
F705 Unit stop
Action
1. Provide correct power supply if
there is power phase is open
2. Repair if there is a problem at
power plug or cable
3. Repair as needed
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