Outdoor Unit Pcb Abnormality - Daikin FTXM-V Series Service Manual

Troubleshooting

4.11 Outdoor Unit PCB Abnormality

E1
Error Code
Method of Error  The system checks if the microprocessor is working in order.
Detection  The system checks if the zero-cross signal comes in properly.
Error Decision
 The microprocessor 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
104
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Turn on the power.
Error again?
NO
Check if the outdoor unit is
grounded.
Grounded?
YES
YES
NO
SiUS042113E
Replace the outdoor unit PCB
(main PCB).
Ground the system.
The cause can be external
factors other than malfunction.
Investigate the cause of noise.
(R21809)
Part 6 Service Diagnosis