Daikin FTX09NMVJU, Service Manual

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Troubleshooting SiUS091601E
81 Service Diagnosis
4.9 Outdoor Unit PCB Abnormality
Error Code
E1
Method of Error
Detection
„
The system checks if the microprocessor is working in order.
„
The system checks if the zero-cross signal comes in properly.
Error Decision
Conditions
„
The microprocessor program runs out of control.
„
The zero-cross signal is not detected.
Supposed
Causes
„
Defective outdoor unit PCB
„
Noise
„
Momentary drop of voltage
„
Momentary power failure
Troubleshooting
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Continuously ON or OFF
Blink
YES
(R21201)
NO
Replace the outdoor unit
PCB (main PCB).
Ground the system.
Zero-cross signal
abnormality.
Replace the outdoor unit
PCB (main PCB).
Check if the outdoor unit is
grounded.
Is LED A blinking?
Grounded?
Turn on the power again.
∗
Before you check the LED A,
cancel the standby electricity
saving function by starting fan
operation with the remote
controller.
∗
Wait at least for 7 sec. after
turning on the power.