278
FDTN-H
(
)
YES
YES
NO
NO
Are the heat
exchanger thermistor
characteristics OK, is
there no short
circuit?
YES
NO
Is the indoor
unit heat exchanger
thermistor connector
connection OK?
YES
NO
Is the air filter
clogged?
Correction
Washing
Adjustment
Is the heating
under overload?
Defective indoor unit PCB
Replacement (Defective indoor unit heat
exchanger thermistor input circuit)
Defective heat exchanger
thermistor Replacement
(1)
4
Error display :
e8
[Heating overload]
Note (1) To see whether or not it is over-
loaded, check the following:
s
Is the inside/outside air
temperature too high?
s
Is there any short circuit?
s
Is the refrigerant excessive?
6
Error display :
e57
[Insufficient refrigerant]
Note (1) Refer to previous page for heat exchanger thermistor heat resistance
characteristic values.
Are the
heat exchanger
thermistor characteristic
normal?
YES
NO
NO
Defective heat exchanger
thermistor Replacement
Is the unit
normalized?
Defective indoor unit PCB
Replacement (Defective
indoor unit heat exchanger
thermistor input circuit)
Inspect at the unit side.
Inspect at the unit side.
Insufficient refrigerant
During cooling
•
Is indoor fan operating?
•
Is the service valve (gas and
liquid side) opened fully?
•
Is there no short circuit?
Recharge with (weighed amount)
of refrigerant.
(1)
5
Error display :
e9
[Failure in drainage]
YES
YES
YES
NO
Is there any
overflow?
NO
Is the float
switch tripped?
Note (1) Check if power source is there between DM connectors.
Is the angle of
drain piping good. Is there
any problem?
YES
NO
(1)
Is there output
for condensate motor
(DM)?
Defective indoor unit PCB Replace-
ment (Defective DM driving output cir-
cuit, defective float switch input cir-
cuit)
Repair or replace the
float switch
Defective indoor unit PCB Replace-
ment (Defective condensate motor output
circuit)
●
Check DM broken wire, burning, locking.
●
Are there any DM connector loose.
●
Are there any PCB faston terminal loose.
●
Are there any DM wire broken.
Repair
Summary of Contents for FDT208HEN-S
Page 74: ...MEMO...
