Mitsubishi Heavy Industries SRK100VNXWZRF Service Manual page 118

Indoor display
Error code
Outdoor unit
Remote control:
E42
Outdoor unit
inverter PCB
1. Applicable model
Model FDC200VSA-W
2. Error detection method
In order to prevent from
overcurrent of inverter,
if the current exceeds the
specifications, it makes the
compressor stopping.
3. Condition of error displayed
• If the output current of inveter
exceeds the specifications,
it makes the compressor
stopping.
• After 3-minute delay, the
compressor restarts, but if this
amonaly occurs 4 times within
30 minutes after the intial
detection.
4. Presumable cause
• Defective outdoor unit control
PCB
• Defective inverter PCB
• Faulty power source
• Insufficient refrigerant amount
• Faulty compressor
• Faulty power transistor
module
Note:
RUN light
ON
Green LED
control PCB
Keeps flashing
Yellow LED
9-time flash
5. Troubleshooting
From previous page
Is the
checked result of power
transistor module
OK?
YES
• Is the space for installation of indoor and/or outdoor unit enough?
• Is there any short-circuit of air on indoor and/or outdoor unit?
• At cooling, does the outdoor fan motor run?
Are the service valves fully opened?
Is the filter clogged?
• At heating, does the indoor fan motor run?
Are the service valves fully opened?
Is the filter clogged?
• Is there any liquid flooding?
Is the superheat within normal range?
Is the low pressure sensor and suction pipe temperature
sensor normal?
• Is there any anoumalous sound on the compressor?
• Check if there is any anomaly in the SV1 circuit with the flow
*
chart below
YES
After
resetting power for
several times does it
become normal?
YES
Temporary noise may cause of anomaly.
If noise source can be found, take countermeasure.
* ： How to check the SV1 circuit.
Check the following when SV1 is OFF.
(Check ON/OFF status of SV1 with Mente PC.)
VAC applied to the CNF terminal
temperature between capillary tube
and compressor of the SV1 circuit below 40 °C
TIMER light
Content
1-time flash
Red LED
1-time flash
(Model FDC200VSA-W only)
Diagnosis
NO
Is 220-240
of the control PCB ?
NO
Is the
when the compressor
is running?
117
- -
'22 • PAC-SM-422
Current cut (2/2)
Countermeasure
Defective inverter
PCB➞Replace.
* Replace also the power
transistor module.
Defective inverter
NO
PCB➞Replace.
* Replace also the power
transistor module.
Change control PCB.
YES
Change the valve of SV1.
YES
The SV1 circuit is normal.
NO