Communication Error Between Inverter Pcb And Outdoor Control Pcb - Mitsubishi Electric FDF71VNXVD Technical Manual

Error code
Remote controller:
E45
1. Applicable model
All models
2. Error detection method
When the communication
between inverter PCB and
outdoor control PCB is not
established.
3. Condition of Error displayed
Same as above.
4. Presumable cause
• Inverter PCB anomaly
• Anomalous connection of
connector between
inverter PCB and outdoor
control PCB
• Outdoor control PCB anomaly
• Outdoor fan motor anomaly
Note:
LED Green Red
Indoor Keeps flashing Stays OFF
Outdoor Keeps flashing 1 time flash
5. Troubleshooting
Diagnosis
Is the
connection of connectors between
the inverter PCB and the outdoor
control
PCB OK?
YES
Are both
switches of JSW10,11(SW1, 2)
on the inverter PCB
set correctly?
YES
Is LED
on the inverter PCB
flashing ?
(2)
Note (2): For model 200 &
250, check during test run
operation.
YES
Is the
communication wire between the
inverter PCB and the outdoor control
PCB connected properly ?
YES
Replace the outdoor control PCB
Does it become normal?
184
–
Content
Communication error between
inverter PCB and outdoor control PCB
NO
(1)
NO
Note (1): Figure in ( ) are for model 200, 250
For 3-phase models
NO
For single-phase models
Note (3):
How to check
voltage at CN13
See E51
Is 15VDC
YES
detected between �
and � on CNI3?
(4)
Note (4): Under anomalous conditions,
NO
the voltage becomes less than 14VDC
(4)
Is 15VDC
detected after disconnecting
outdoor fan motor?
NO
NO
YES
–
'11 • PAC-T-160
Countermeasure
Correct the connection
Set JSW10, 11(SW1, 2)
correctly
No power is supplied to
inverter PCB
Check the power supply
voltage and correct it
If not solved, find the cause
by checking following points.
• Fan motor anomaly
• 52X anomaly (model 200, 250 only)
(3)
• Broken cement resistor (15Ω)
(model 200, 250 only)
YES
Replace outdoor fan motor
NO
Replace control PCB
if not solved, replace
INV PCB as well
Connect the communication
wire securely
Replace inverter PCB
OK