Mitsubishi KXZ Series - Page 257

Error code
Remote control:
7-segment display:
LED Green Red
Indoor
Outdoor
Content
E40
E40
High pressure anomaly
(63H1-1 activated)
Keeps flashing Stays Off
Keeps flashing 1 time flash
1. Applicable model
5. Troubleshooting
Outdoor unit
Diagnosis Countermeasure
YES
NO
Save data for 30 minutes before stopping in Mente PC
Connect a pressure gauge and
restart operation.
Was 63H1
activated at 4.15MPa
or higher?
Does the sensed
value of the high pressure
sensor show 4.15MPa?
(Normal?)
Are the
63H1-1 OK?
Are the connector and/or
harnesse
OK?
Are the
service valves fully
open?
Is it
stop at 4.15MPa of gauge
pressure ?
Is there any
clogging in the refrigerant
circuit ?
NO
NO
YES
Check and save the data of
operating condition.
Check the sensed value of
high pressure sensor when the
63H1-1 is activated.
Check whether the high
pressure switch is activated
at the sensed value of high
pressure sensor.
High pressure sensor
anomaly is suspicious.
Check high pressure sensor
itself according to the
troubleshooting procedure of
E54, after retarting operation.
(If the high pressure sensor
[PSH] fails, replace it)
If the connector is
disconnected or the harness
is broken, correct it.
Also check whether the
high pressure switch is
properly mounted or not.
Open operation valve.
Check it, as much as
possible, under the
operating conditions for
30 minutes before error
occurred.
Replace outdoor control
PCB.
Remove clogs.
Check items (condenser
side):
•
Filter clogging
• Air flow volume (Fan
motor)
• Short-circuit of air flow
2. Error detection method
When high pressure switch
63H1-1 is activated
3 . Condition of error displayed
• If high pressure exceeds
4.15MPa
• If 63H1-1 is activated 5 times
within 60 minutes
• If 63H1-1 is activated for 60
minutes continuously
4. Presumable cause
• Short-circuit of airflow
at condenser side of heat
exchanger/Disturbance of
airflow/Clogging filter/Fan
motor anomaly
• Disconnection of high
pressure switch connector
• Breakage of high pressure
switch harness
• Closed service valves
• High pressure sensor anomaly
• High pressure switch anomaly
Note: If the error does not recur, connect the Mente PC and continue to collect data.
YES
YES
YES
YES
NO
NO
NO
E42
E42
Current cut (1)
Stays Off
1. Applicable model
5. Troubleshooting
Outdoor unit
Diagnosis Countermeasure
Is the
power source
voltage OK?
Are the
service valves
opened?
Continue to next page
NO
NO
Is the
high pressure during
operation
OK?
NO
Is the
checked result
of insulation resistance
and resistance between
terminals of
compressor motor
OK?
NO
Check power source.
Open the valves.
Check refrigerant amount
and refregerant circuit.
*In case of transitional
increase of high pressure
and/or test run, several
times restarting may
recover it, because
liquid refrigerant in the
compresser is discharged
from the compressor.
Replace compressor.
2. Error detection method
In order to prevent from
overcurrent of inverter,
if the current exceeds the
compressor stopping.
3 . Condition of error displayed
If the output current of inveter
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
• Open the valves
• Faulty power source
• Insufficient refrigerant amount
• Faulty compressor
• Faulty power transistor
module
Note:
Error code
Remote control:
7-segment display:
LED Green Red
Indoor
Outdoor
Content
YES
YES
YES
Model
typ Resistance (Ω)
at 20°C
FDC90-155KXZEN1-W 0.448
FDC112-155KXZES1-W 1.56
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255
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'20 • KX-T-373