Outdoor Unit Pcb Abnormality - Daikin FTKM-U Series Service Manual

SiMX042215E

4.10 Outdoor Unit PCB Abnormality

E1
Error Code
Method of Error
 The system checks if the microcomputer is working in order.
Detection  The system checks if the zero-cross signal comes in properly.
Error Decision  The microcomputer program runs out of control.
Conditions  The zero-cross signal is not detected.
Supposed
 Defective outdoor unit PCB
Causes  Noise
 Momentary drop of voltage
 Momentary power failure
Troubleshooting
Part 6 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?
Blink
Check if the outdoor unit is
grounded.
Grounded?
YES
Continuously ON, OFF
NO
Troubleshooting
Replace the outdoor unit
PCB (main PCB).
Ground the system.
Zero-cross signal
abnormality.
Replace the outdoor unit
PCB (main PCB).
(R24717)
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