Hitachi RAC-25WSA RAC25WSA Manual Do Utilizador
Códigos do produto
RAC25WSA
14-25
14.7 TROUBLESHOOTING WHEN INDOOR TIMER LAMP BLINKS
14.7.1 MONOZONE / MULTIZONE INDOOR
No
Blinking of TIMER lamp
Reason for indication
Possible causes
RAK RAF
RAI
RAD
1
When the indoor heat exchanger
temperature is too low in the
heating mode or it is too high in
the cooling mode.
temperature is too low in the
heating mode or it is too high in
the cooling mode.
Refrigerant cycle abnormal
1) Reversing valve defective
2) Heat exchanger thermistor
2) Heat exchanger thermistor
disconnected (only in
heating mode)
heating mode)
The malfunction mode is
displayed only after the
abnormal condition occurs 3
displayed only after the
abnormal condition occurs 3
rd
time (read every 3 minutes
• Four-way valve faulty.
*Note (for RAI & RAD)
• Disconnection in heat
exchange thermistor
(only during heating)
(only during heating)
★
★
★
★
2
When the outdoor unit is in
forced operation or balancing
operation after forced operation
forced operation or balancing
operation after forced operation
Outdoor unit forced operation.
Electrical parts in the outdoor
unit.
unit.
★
★
★
★
3
When the interface signal from
the outdoor unit is interrupted.
the outdoor unit is interrupted.
Indoor/outdoor interface
defective
defective
1) Indoor interface circuit.
2) Outdoor interface circuit
2) Outdoor interface circuit
★
★
★
★
4
When the error mode is detected
times within 30 minutes from
outdoor unit electrical
components. (However, when
error is detected 8 times within
two hours only for outdoor
thermistor
times within 30 minutes from
outdoor unit electrical
components. (However, when
error is detected 8 times within
two hours only for outdoor
thermistor
Outdoor electrical assembly
defective
defective
Outdoor unit electrical
components. (For details,
operate again using remote
controller and check from self-
diagnosis display of outdoor
unit)
components. (For details,
operate again using remote
controller and check from self-
diagnosis display of outdoor
unit)
★
★
★
★
6
All stop when the float switch
has been activated
has been activated
Abnormal water level detection
1) Drain stopped up
2) Drain pump
3) Float switch
2) Drain pump
3) Float switch
★
★
7
When the knob of drain pump
test switch at indoor P.W.B main
slide to “test” position.
test switch at indoor P.W.B main
slide to “test” position.
Drain pump forced operation
1) Indoor PWB (Main)
★
★
9
When room thermistor or heat
exchanger thermistor is opened
circuit or short circuit.
exchanger thermistor is opened
circuit or short circuit.
Room thermistor or heat
exchanger thermistor is faulty
exchanger thermistor is faulty
1) Room thermistor
2) Heat exhanger thermistor
2) Heat exhanger thermistor
★
★
★
★
10
Overcurrent in indoor DC fan
motor has been detected.
motor has been detected.
Over-current detection at the DC
fan motor
fan motor
1) Indoor fan locked
2) Indoor fan motor
3) Indoor control P.W.B.
2) Indoor fan motor
3) Indoor control P.W.B.
★
★
★
★
11
When data read from IC401 or
IC402 is incorrect.
IC402 is incorrect.
IC401 or IC402 data reading error IC401 or IC402 abnormal
★
★
★
★
*Note: Refer to Chapter 9 for error codes displayed on remote controllers.
(
Lights for 0.35 sec. at interval of 0.35 sec.)
<Cautions>
1) If the interface circuit is faulty when power is supplied, the self diagnosis display will not be displayed
2) If the indoor unit does not operate at all, check if the connecting cable is connected to the outdoor unit.
1) If the interface circuit is faulty when power is supplied, the self diagnosis display will not be displayed
2) If the indoor unit does not operate at all, check if the connecting cable is connected to the outdoor unit.
1 time
2sec
2sec
2 times
2sec
3 times
2sec
4 times
2sec
6 times
2sec
7 times
2sec
9 times
2sec 10 times
2sec 13 times