E44
E44
Stays Off
1. Applicable model
5. Troubleshooting
Outdoor unit
Diagnosis Countermeasure
Is the unit
installation environment
within the range of
limitation?
Is the
refrigerant amount and
piping length
OK?
Is
insertion of
the sensor connector into
the connector on outdoor unit
control PCB
OK?
Is
the temperature
sensors of discharge pipe,
suction pipe, Tho-H and indoor
heat exchanger OK?
Is high pressure
sensor OK?
Save data for 30 minutes before stopping in Mente PC.
Is the
connected number
of indoor units checked by
Mente PC same as that
mentioned in utility
drawing?
After restarting,
does it recur?
Reset the power source and restart.
Is the
operation of
indoor EEV OK ?
(at cooling)
Is the operation of outdoor
EEVH OK? (at heating)
Is the operation of
outdoor EEVSC OK?
(at heating and
cooling)
Check and save the data of
operating condition.
Check ROM version.
Propose the client to
improve.
Adjust refrigerant amount
properly. (Check whether
the charged amount is
excess.)
If the piping length is less
than 5m, calculate the
correct charging amount
and reduce excessive
refrigerant amount.
Connect the signal wires
between indoor and
outdoor units securely.
Insert the connector
securely.
Replace the sensor
after checking whether the
sensor characteristics is
OK ot not.
Restart operation and check
it, as much as possible,
under the operating
conditions for 30 minutes
before error occurred.
Wait and see.
If possible, continue
to collect data. (Keep
connecting Mente PC.)
Replace EEV coil or EEV
main body.
Check refrigerant amount
again.
2. Error detection method
When it detects that the overheat
temperature of discharge pipe
decreased
3
.
Condition of error displayed
If the overheat temperature
of discharge pipe is detected
5ºC or lower for 10 minute
continuously.
If the compressor stop is
detected 3 times within 60
minutes
4. Presumable cause
• Faulty discharge pipe
temperature sensor
• Faulty high pressure sensor
• Faulty connection signal wires
between indoor and outdoor
units
• Excessive refrigerant amount
• Faulty indoor EEV
• Faulty indoor heat exchanger
temperature sensor
• Faulty outdoor EEVH
• Faulty suction pipe
temperature sensor or
faulty low pressure sensor
• Falty outdoor EEVSC
• Faulty Tho-H temperature
sensor
• Piping length is out of
limitation range
Note:
Error code
Remote control:
7-segment display:
LED Green Red
Indoor
Outdoor
Content
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
NO
YES
YES
1 time flash
E45
E45
Communication error between
inverter PCB and outdoor unit control PCB(1)
Stays Off
1. Applicable model
5. Troubleshooting
Outdoor unit
Diagnosis Countermeasure
Are the
connectors of inverter
PCB and outdoor unit control
PCB OK?
Are
both JSW10 and 11
settings on the inverter PCB
correct?
Save data for 30 minutes before stopping in Mente PC.
NO
NO
Is LED on the inverter
PCB flashing?
Does it become normal?
Replace outdoor unit control PCB.
YES
NO
Check and save the data of
operating conditions.
Insert the connectors
securely.
Refer to the switch setting
(Page 215) and restart
the outdoor unit.
No power on inverter PCB.
Refer to next page.
Replace inverter PCB.
OK
2. Error detection method
3
.
Condition of error displayed
If the communication between
inverter PCB and outdoor unit
control PCB is not established.
4. Presumable cause
• Faulty inverter PCB
• Faulty connector between
• Faulty main circuit connection
(Three phase model)
•
Faulty relay or cementing resister
(Three phase model)
inverter PCB and outdoor unit
control PCB
•
Faulty outdoor unit control PCB
Note:
Error code
Remote control:
7-segment display:
LED Green Red
Indoor
Outdoor
Content
YES
YES
YES
A
NO
-
259
-
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