Control Pcb A/F Module Anomaly - Mitsubishi Heavy Industries FDT100VNAWVH Service Manual

Error code
Remote control: E47
control PCB
Outdoor unit
control PCB
1. Applicable model
Models FDC -W
2. Error detection method
In order to avoid an unexpected
trouble, if the protective circuit
defect unexpected voltage,
current and movement of the
power element, it makes the
compressor stopping.
3. Condition of error displayed
• If the anomaly occurs,
it makes the compressor
stopping.
• After 3-minute delay, the
compressor restarts
f this anomaly occurs 4
times within 30 minutes or
continues for 15 minutes
contin ously.
4. Presumable cause
• Defective main PCB
• Defective reactor PCB
Note:
LED Green
Indoor unit
Keeps flashing
Keeps flashing
5. Troubleshooting
power s
connected properly
between the reactor PCB
(P
Change the control PCB (P B1)
Does it become nomal?
Red Content
Stays OFF
(Models FDC100-140VNA-W only)
1-time flash
Diagnosis
Is the
ource
voltage OK?
YES
Are wires
7) and the control
PCB (P B1) ?
YES
121
- -
'19 • PAC-SM-309
PCB A/F module anomaly
Countermeasure
Check power source.
NO
Correct wires.
NO
Change the reactor PCB
NO
(P B7) and the connection
wire between the reactor
PCB (P B7) and the
control PCB (P B1).