Outdoor Unit Pcb Abnormality - Daikin FTX20K(2)V1B Service Manual

SiBE041525F
4.9

Outdoor Unit PCB Abnormality

E1
Error Code
 The system checks if the microprocessor is working in order.
Method of Error
 The system checks if the zero-cross signal comes in properly.
Detection
 The microprocessor program runs out of control.
Error Decision
 The zero-cross signal is not detected.
Conditions
 Defective outdoor unit PCB
Supposed
 Noise
Causes
 Momentary drop of voltage
 Momentary power failure
Troubleshooting
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.
Check the voltage of the
connection wires on the indoor
terminal board between No. 1
and No. 2.
Normal?
YES
Is LED A blinking?
Blink
Check if the outdoor unit is
grounded.
Grounded?
YES
NO
∗ 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.
Continuously ON or OFF
NO
Troubleshooting
Replace the connection wires
between the indoor unit and
outdoor unit.
Replace the outdoor unit
PCB (main PCB).
Ground the system.
Zero-cross signal
abnormality.
Replace the outdoor unit
PCB (main PCB).
(R22771)
60