Outdoor Unit Pcb Abnormality - Daikin FTXS20G2V1B Service Manual

SiENBE04-808_A
4.8

Outdoor Unit PCB Abnormality

E1
Remote Control
Display
„ The system follows the microprocessor program as specified.
Method of
„ The system checks to see if the zero-cross signal comes in properly.
Malfunction
Detection
„ The microprocessor program runs out of control.
Malfunction
„ The zero-cross signal is not detected.
Decision
Conditions
„ Defective outdoor unit PCB
Supposed
„ Broken harness between PCBs
Causes
„ Noise
„ Momentary fall of voltage
„ Momentary power failure, etc
Troubleshooting
20/25/35/50 class
Service Diagnosis
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
Turn on the power again.
Is LED A blinking?
YES
Check to see if the outdoor unit is
grounded.
Grounded?
YES
Is the harness
broken?
NO
∗ Before you check the LED A,
cancel the standby electricity
saving function by operating
fan operation with the remote
control.
∗ Wait at least for 7 sec. after
NO
turning on the power.
NO
YES
Troubleshooting
Replace the outdoor unit
PCB.
Ground the system.
Replace the harness.
Zero-cross signal
abnormality.
Replace the outdoor unit
PCB (1).
(R12161)
112