Mitsubishi Heavy Industries FDE112KXE6A, Руководство по обслуживанию

Страница: 51 / 218

–
49
–
Error code
Remote controller:
7-segment display:
LED Green Red
Indoor
Outdoor
Content
None
Operates but does not heat
Keeps flashing Stays Off
Keeps flashing Stays Off
1. Applicable model
5. Troubleshooting
All models
Diagnosis Countermeasure
NO
YES
YES
NO
YES
YES
YES
NO
NO
NO
YES
NO
Check the indoor fan operation
Check the temperature difference between
return and suction air of indoor unit
Mistake in model selection.
Calculate heat load once more.
Check following operation control function.
. Control for determing compressor rotation speed
. Protective control by controlling compressor
rotation speed
Which control is appropriate to this phenomenon
The unit is operating normally, but is operating
under the protective control of compressor or
other respective components
Is the
temperature differnce
between return and
suction air 10-30° at
heating?
Does the
heat load increase after
installtion?
Is the compressor
operating?
Is the
compressor rotation
speed low?
Is the
operating conditions of
indoor/outdoor unit
under rated condition?
" WAIT "
message is displayed [for
3 seconds] when performing
cooling, defumidifying or heating
operation from remote
controller?
Note (1) Outdoor: 7ºC
Indoor : 20ºCDB
It is normal
(This unit is designed
to start in the soft start
mode by detecting the
compressor under-dome
temperature when it restart
after power reset)
It is necessary to replace to
higher capacity unit or to
install additional unit
Compressor refrigerant
oil protective control at
starting is activated.
For the contents of control,
refer to the compressor
start control.
Compressor may be
stopped by the error
detection control.
For the contents of control,
refer to anomalous stop
control by controlling
compressor rotation speed
of microcomputer control
function
Check the followings
• Minor clogging of filter
• Minor fouling of heat exchanger
• Minor short-circuit of airflow
• Slightly insufficient or excessive
refrigerant amount
• Poor compression of compressor
Check suspicious points
considering appropriate
operation control
Check the followings for
reference
• Severe clogging of filter
• Severe clogging of heat
exchanger
• Severe short-circuit of airflow
• Severely insufficient or
excessive refrigerant amount
• Under protective control of
compressor
• Indoor unit fan tap setting
• Valid setting of silent mode
2. Error detection method
3. Condition of error displayed
4. Presumable cause
• 4-way valve anomaly
• Poor compression of
compressor
• Expansion valve anomaly
operation
Note: