5-1
Troubleshooting pro c e d u re s
1st
• Items to be checked first.
2nd
• Check the corrective actions in the case of occurrence of self-diagnosis mode.
3rd
• When the trouble is not related to the 1st or 2nd items above, check the troubled area in detail in accordance
with the fault analysis method by symptom.
5. Troubleshooting
5-1 Items to be checked first
1) Is the supply voltage appropriate ?
Report to 3-10 Page-Electric
2) Is the connecting wire between the indoor unit and outdoor unit appropriate ?
The indoor unit and outdoor unit should be connected with each other by 8 cables. (sensor wire included)
Be sure to check whether the cables for the indoor unit and outdoor unit are securely connected by the
same terminal number.
3) When any claim occurs according to the contents of the table below, it is not related to the trouble of the
air conditioner at all.
5-2 Self-diagnosis and Cor
rective Actions
No
1
2
3
4
5
6
7
8
Operation of air conditioner
• In a COOL operation mode, the compressor does not operate at a
room temperature higher than the setting temperature that the
compressor should operate.
• In a HEAT operation mode, the compressor does not operate at a
room temperature lower than the setting temperature that the
compressor and indoor fan should operate.
The fan speed cannot be controlled during AUTO, DRY, TURBO, or
MILD operation.
The temperature is not set during AUTO, FAN, TURBO or MILD
operation.
Compressor stops operation intermittently in DRY mode.
Compressor of the outdoor unit is operating although it is turned off in
a HEAT mode.
Timer Display only of the indoor unit lights up and the air conditioner
does not operate.
The compressor and indoor fan stop intermittently in HEAT mode.
Indoor fan and outdoor fan stop operation intermittently in a HEAT
mode
Description
• In happens after a delay of 3 minutes when the compressor is reoperated.
The same phenomenon occurs when a power is on.
• As a phenomenon that the compressor is reoperated after a delay of 3 minutes, the
indoor fan is adjusted automatically with re f e rence to a temperature of the air blew
• The fan speed is automatically set at the micom during AUTO, DRY, TURBO or
MILD operation.
• The desired temperature is automatically set at the micom during AUTO, TURBO or
MILD operation.
• The fan operation circulates the room air without temperature control
Compressor operation is controlled automatically in DRY mode depending on rthe
room temperature.
When the unit is turned off while de-ice is activated, the compressor continues
operation for up to 9 minutes 40 sec (maximum) until the deice is completed.
Timer is being activated and the unit is in ready mode.
The unit operates normally if the timer operation is cancelled.
The compressor and indoor fan stop intermittently if room tempreature exceeds
a setting temperature in order to protect the compressor from overheated air in a
HEAT mode.
The compressor operates in a reverse cycle to remove exterior ice in a HEAT
mode, and indoor fan and outdoor fan do not operate intermittently for within 20% of
the total heater operation
NO
Control panel
Te m p e r a t u r e
Cause
Cor rective actions
lamp condition
display
1
2
3
4
Check display
on blinking(1Hz)
Check display
on blinking(1Hz)
Check display
on blinking(1Hz)
Check display
on blinking(1Hz)
E1
E2
E5
E6
• Room temperature sensor short
• Room temperature sensor open
• Panel shutter binding at the time of
mechanical assembly.
• Defective panel shutter motor.
• Defective sensor PCB.
• Indoor evaporator sensor open or shor t
• Outdoor condensor sensor open or short
• Replace the room temperature sensor.
• Check the main PCB pattern and components for short or open.
• Remove cause of binding.
• Replace the panel shutter motor.
• Replace the sensor PCB.
• Check the evaporator sensor wir e
• Replace the evaporator sensor wire
• Check the main PCB pattern and componets for short or open
• Check the condensor sensor wir e
• Replace the evaporator sensor wire
• Check the main PCB pattern and componets for short or open
Summary of Contents for KFH28PV2
Page 4: ...2 2 2 2 Dimensions Indoor Unit Outdoor Unit unit mm 330...
Page 26: ...Disassembly and Reassembly 4 5 No Parts Procedur e Remark...
Page 35: ...6 1 6 Exploded Views and Parts List 6 1 Indoor Unit...
Page 37: ...6 3 6 1 1 ASS Y COVER FRONT Exploded Views and Parts List...
Page 39: ...6 5 6 1 2 ASS Y GRILLE INLET Exploded Views and Parts List...
Page 41: ...6 7 6 2 Outdoor unit 19 18 14 1 16 17 15 7 6 9 11 13 12 8 2 4 5 19 1 19 2 10 3...
Page 46: ...8 1 8 PCB Diagrams 8 1 Ass y Main PCB CODE NO DB93 10531B...
Page 48: ...8 3 8 2 Ass y Power PCB Code No DB93 10532B...
Page 51: ...9 1 9 Wiring Diagrams 9 1 Indoor Unit...
Page 52: ...9 2 9 2 Outdoor Unit...
Page 54: ...10 1 10 Schematic Diagrams 10 1 Indoor Unit...
Page 55: ...10 2 10 2 Remote Control...