Mitsubishi Heavy Industries SRK100VNXPZSX Technical Manual page 143

Error code Indoor display
Remote control:
E45
Outdoor unit
Outdoor unit
inverter PCB
1. Applicable model
All models
2. Error detection method
When the communication
between inverter PCB and
outdoor unit control PCB
is not established.
3. Condition of error displayed
Same as above.
4. Presumable cause
• Defective inverter PCB
• Defective connector between
the outdoor unit control PCB
and inverter PCB
• Defective outdoor unit control
PCB
• Defective outdoor fan motor
Note:
RUN light
–
Green LED
Keeps flashing
control PCB
Yellow LED
Keeps flashing
5. Troubleshooting
connection of connectors between
the inverter PCB and the outdoor unit
control PCB OK?
Are both
switches of JSW10,11
on the inverter PCB
set correctly?
on the inverter PCB
flashing?
communication wire between the
inverter PCB and the outdoor unit control
PCB connected properly?
Replace the outdoor unit control PCB
Does it become normal?
TIMER light
Content
–
Communication error between
Red LED
1-time flash
inverter PCB and outdoor unit control PCB
Diagnosis
Is the
YES
YES
Is LED
NO
For single-phase models
YES
Is DC15V
detected between ②
YES
and ③ on CNI3?
NO
Is DC15V
detected after disconnecting
outdoor fan motor?
Is the
YES
142
- -
Countermeasure
Correct the connection.
NO
Set JSW10, 11 correctly
NO
➞ See page 96 or 97.
For 3-phase models
No power is supplied to
inverter PCB.
Check the power source
voltage and correct it
If not solved, find the
Note(1) How to check
voltage at CN13
cause by checking
→See E51
following points.
⑴
• Fan motor anomaly
⑵
Note(2) Under anomalous
conditions, the
voltage becomes
less than DC14V
YES
Replace outdoor fan motor
Replace outdoor unit control
NO
PCB if not solved, replace
inverter PCB as well
Connect the
NO
communication wire
securely
Replace inverter PCB
NO
OK
YES
'17 • PAC-T-257