-
223
-
Error code
Remote control:
7-segment display:
LED Green Red
Indoor
Outdoor
Content
None
Earth leakage breaker activated
Stays Off Stays Off
Stays Off Stays Off
1. Applicable model
5. Troubleshooting
All models
Diagnosis Countermeasure
NO
NO
Is insulation
of respective harnesses OK?
YES
Check of the outdoor unit grounding wire and earth leakage breaker
① Run an independent grounding wire from the grounding screw
of outdoor unit to the grounding terminal on the distribution
panel. (Do not connect to another grounding wire.)
② In order to prevent malfunction of the earth leakage breaker
itself, confirm the conformity of high harmonic regulation.
* Insulation resistance of compressor
• Immediately after installation or when the unit has been left
for long period without power source, the insulation
resistance may drop to a few MΩ because of refrigerant
migrated in the compressor.
When the earth leakage breaker is activated at
lower insulation
resistance, check the following points.
① 6 hours after power ON, check if the insulation resistance
recovers to normal.
When power ON, crankcase heater heat up compressor and
evaporates the refrigerant migrated in the compressor.
② Check if the earth leakage breaker is conformed to higher
harmonic regulation or not.
Since the unit has inverter, it is necessary to use components
conformed to high harmonic regulation in order to prevent
malfunction of earth leakage breaker.
YES
Check the outdoor unit grounding
wire and earth leakage breaker
Is any hamess bitten
between pannel and casing
or etc.?
NO
YES
Is the checked
result of insulation resistance
and resistance between terminals
of compressor motor
OK?
Replace compressor. *
Secure insulation
resistance.
Secure insulation
resistance.
2. Error detection method
3
.
Condition of error displayed
4. Presumable cause
• Compressor anomaly
• Noise
Note:
Error code
Remote control:
7-segment display:
LED Green Red
Indoor
Outdoor
Content
None
Excessive noise/vibration (1/3)
– –
– –
1. Applicable model
5. Troubleshooting
All models
Diagnosis Countermeasure
Does
the installation
of indoor/outdoor unit have
looseness?
[Installation work]
Does the noise/vibration
occur not only from the
air-conditioner
but also from
entire building?
[Units]
Does noise/vibration
occur when only the fan
is operating?
Are pipes
touching the wall
and etc?
Is fan or louver
touching other
components?
To 2/3
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
Does noise/
vibration occur during
or soon after stopping
operation of
air-conditioner?
If excessive noise/vibration
persists when sufficient
time has elapsed after
stopping the unit, it is
considered that the air-
conditioner is not the
source.
Check the installed
condition carefully, and
correct the installed
position or insert rubber
cushions into the gap or
take other measure in order
to eliminate looseness.
Prevent the vibration from
transmitting to wall and etc
by fixing pipes on the wall
tightly or wrapping rubber
cushion around the pipe
which goes through the
hole in the wall or applying
other appropriate means.
Strength of ceiling
wall, floo , etc. may be
insufficient. Review the
installation place or apply
reinforcement to increase
the strength.
Check for leaning of
installed unit or incorrect
mounting of fan, louver or
motor, and then specify the
contacting point and correct
it.
When th eheat exchanger
or filter is clogged, clean
them.
In case that the unit is
installed at the site where
background noise is very
low, even the low level
noise from indoor unit like
as refrigerant flow noise
can be heard, but it is normal.
Before installation, check
for background noise. If
background noise is very
low, convince client prior
to installation.
2. Error detection method
3
.
Condition of error displayed
4. Presumable cause
① Improper installation work
・Improper vibration-proof
work at instllation
・Insufficient strength of
mounting surface
② Anomaly of product
・Before/after shipment from
factory
③ Improper adjustment during
commissioning
・Excessive/insufficient
refrigerant.
Note:
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