E40 High Pressure Error (63H1 Activated) - Mitsubishi Electric FDF100VSXVD Technical Manual

Error code
E40
Remote controller:
1. Applicable model
All models
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-minutes 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 control
PCB
• Defective 63H1 connector
• Defective electronic
expansion valve connector
• Closed service valve
• Mixing of non-condensing gas
(nitrogen, etc.)
Note:
In the protective control range for compressor startup (initial startup after power ON), even if 63H1 is activated only once
(63H1turns OFF), immediately the error is displayed.
LED Green Red
Indoor Keeps flashing Stays OFF
Outdoor Keeps flashing 1 time flash
5. Troubleshooting
Diagnosis
If the power supply 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?
・Are sufficient return air/supply air
space secured?
2. During heating
・Isn't the indoor heat
exchanger temperature thermistor
disconnected from the thermistor
casing?
・ Isn't the filter clogged?
* 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
sub-cooling degree.
179
–
Content
High pressure error (63H1 activated)
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 supply must
be reset.
YES
–
'11 • PAC-T-160
Countermeasure
Open service valve.
Correct 63H1 connector.
NO
Correct electronic
NO
expansion valve connector.
Defective outdoor control
PCB Replace.
(Defective 63H1 input
circuit)