Mitsubishi Heavy Industries SRK100VNXWZRF Service Manual page 119

Error code Indoor display
Remote control:
E44
Outdoor unit
Outdoor unit
inverter PCB
1. Applicable model
Model FDC200VSA-W
2. Error detection method
Detected by under-dome
superheat.
3. Condition of error displayed
When abnormal liquid back
is detected 3 times within 90
minutes, the compressor stops.
4. Presumable cause
• Faulty indoor unit fan
• Faulty body of SV1
• Faulty outdoor unit control
PCB
• Short-circuit of air on indoor
units
• Fouling, clogging of heat
exchanger
• Clogged filter
• Abnormal condition of Tho-H,
Tho-R1, Tho-R2, PSL
• Faulty coil of EEVC
• Faulty body of EEVC
Note:
RUN light
–
Green LED
Keeps flashing
control PCB
Yellow LED
Keeps flashing
5. Troubleshooting
problem with the indoor unit fan?
・ Is there any short-circuit of indoor unit air?
・ Is there any fouling, clogging on indoor heat exchanger?
・ Is the filter in indoor unit clogged?
installation (Tho-H, Tho-R1, Tho-R2, PSL)?
・ Is the connector (Tho-H, Tho-R1, Tho-R2, PSL) disconnected
・ Is the insulation of the sensor (Tho-H)
temperature and pressure of the
sensors (Tho-H, Tho-R1, Tho-R2, PSL) correct?
(By comparison between actual measured value
and Mente PC or 7-segment data)
problem with the coil of EEVC function?
・ Is the coil removed from the body of EEVC?
・ Is the coil wiring broken?
sound and vibration of EEVC generated
when the power source is turned on?
Check the followings when
SV1 is OFF.
(Check ON/OFF status of
SV1 by Mente PC.)
Is 220-240
VAC applied to the
CNF terminal on the
control PCB ?
NO
Is the
temperature between
capillary tube and compressor of the
SV1 circuit below 40°C when the
compressor is
running?
TIMER light
Content
–
Red LED
1-time flash
(Model FDC200VSA-W only)
Diagnosis
・ Is there any
NO
・ Is there any
problem with the sensor
or half-inserted?
insufficient?
NO
Is the detected
YES
Is there any
・ Is the coil connector
disconnected?
NO
Is the start-up
YES
Does EEVC
operate when EEVC connector
is connected to CNEEV2 and
the power source
is turned on?
118
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'22 • PAC-SM-422
Liquid back error
(Cooling mode)
Countermeasure
Fix abnormal condition.
YES
Fix abnormal condition.
YES
Change the sensor.
NO
Fix abnormal condition.
YES
NO
Change control PCB.
YES
Change the body of EEVC.
NO
Change control PCB.
YES
Change the body of SV1.
YES
Check the other actuator.
NO