Outdoor Unit Pcb Abnormality - Daikin E-Series Service Manual

SiENBE12-620

5.11 Outdoor Unit PCB Abnormality

E1
remote control
Display
Outdoor Unit LED
A
Display
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes
Troubleshooting
Service Diagnosis
1 2 3 4
5 4 4 4
Detect within the programme of the microcomputer that the programme is in normal running
order.
When the programme of the microcomputer is in abnormal running order.
Out of control of microcomputer caused by external factors
Noise
Momentary fall of voltage
Momentary power loss
Defective outdoor unit PCB
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Power on again
Error again?
NO
Check to see that the machine is
grounded.
Grounded?
YES
E1
1
YES
NO
Troubleshooting
Replace the outdoor unit
PCB.
Carry out grounding work.
The cause can be external
factors other than
malfunction.
Investigate the cause of
noise.
(R5142)
225