Mitsubishi Heavy Industries SRK100VNXWZRF Service Manual page 111

Error code Indoor display
Remote control:
E40
Outdoor unit
Outdoor unit
inverter PCB
1. Applicable model
Model FDC200VSA-W
2. Error detection method
When the high pressure switch
63H1 is activated.
Compressor OFF
Compressor ON
3.15 4.15
High pressure (MPa)
3. Condition of error displayed
If 63H1 turns OFF (opened),
the compressor stops. After
3-minute delay, the compressor
restarts. If this anomaly occurs
5 times within 60 minutes
or continues for 60 minutes
continuously.
4. Presumable cause
• Short-circuit of air flow,
disturbance of air flow and
clogging filter at outdoor heat
exchanger/Breakdown of fan motor
• Defective outdoor unit control PCB
• Defective 63H1 connector
• Defective electronic expansion
valve connector
• Closed service valve
• Mixing of non-condensing gas
(nitrogen, etc.)
• Faulty sensor(Tho-R1, Tho-R2,
Thi-R1, Thi-R2, Tho-H, PSL)
Note:
In the protective control range for compressor startup (initial startup after power ON), even if 63H1 is activated only once
(63H1 turns OFF), immediately the error is displayed.
RUN light
–
Green LED
Keeps flashing
control PCB
Yellow LED
Keeps flashing
5. Troubleshooting
If the power source breaker is turned OFF and ON too quickly,
E40 may be displayed.
(This is normal.)
Is the
service valve fully
opened?
YES
Has 63H1 activated?
On operation YES
of 63H1
1. During cooling
・ Is the outdoor fan motor
running?
・ Isn't any short-circuit of air on
the outdoor unit?
・ Is Tho-R1, Tho-R2, Tho-H, PSL
normal?
・ Is the sensor(Tho-R1, Tho-R2,
Tho-H) detached from the sensor
holder?
・ Is the sensor(Tho-H) covered with
insulation?
・ Are sufficient return air/supply air
space secured?
2. During heating
・ Isn't the indoor heat
exchanger temperature sensor
disconnected from the sensor
casing?
・ Isn't the filter clogged?
・ Is Thi-R1, Thi-R2, Tho-H, PSL
normal?
・ Is the sensor(Tho-R1, Tho-R2,
Tho-H) detached from the sensor
holder?
・ Is the sensor(Tho-H) covered with
insulation?
* Under the condition of
overcharging refirgerant, 63H1
may activate due to delay of
starting the preventive control by
compressor speed control,
because detected heat exhanger
temperature, which conducts
compressor speed control,
becomes lower than normal
condition due to excess
subcooling degree.
TIMER light
High pressure error
Content
–
Red LED
1-time flash
(Model FDC200VSA-W only)
Diagnosis
NO
NO
Is 63H1
connector connected
properly?
YES
Is the
electronic expansion
valve connector
connection
OK?
If any anomaly
exists on the
electronic
expansion valve
connector
connection, the
power source must
be reset.
110
- -
'22 • PAC-SM-422
(63H1 activated)
Countermeasure
Open the service valve.
NO Correct 63H1 connector.
NO
Correct electronic
expansion valve connector.
YES Defective outdoor unit
control PCB➞Replace.
(Defective 63H1 input
circuit)