IVT 09LR-N Service Manual page 38

12LRN
Problem Outdoor
symptom unit indi-
cation
(LED1)
Indoor unit 3-time      Timer (Orange)
operates.
Outdoor unit
does not
operate tem-
porarily.
Indoor and 5-time      Timer (Orange)
outdoor units

do not oper-
ate.
     Timer (Orange)

     Timer (Orange)

     Timer (Orange)

     Timer (Orange)


     Timer (Orange)


Indoor and 6-time      Timer (Orange)
outdoor units
 
do not oper-
ate.
     Timer (Orange)
 
Indoor and 7-time      Timer (Orange)
outdoor units
   Operation (Red)
do not oper-
ate.
     Timer (Orange)
   Operation (Red)
     Timer (Orange)
   Operation (Red)
     Timer (Orange)
   Operation (Red)
Indoor unit Malfunc-
tion No.
Lamp Main Sub
3 0
  Operation (Red)
Plasmacluster
(Blue)
5 0
 Operation (Red)
Plasmacluster
(Blue)
1
 Operation (Red)
Plasmacluster

(Blue)
2
 Operation (Red)
Plasmacluster

(Blue)
3
 Operation (Red)
Plasmacluster
 
(Blue)
4
 Operation (Red)
Plasmacluster
(Blue)
5
 Operation (Red)
Plasmacluster

(Blue)
6 0
Operation (Red)
Plasmacluster
(Blue)
1
Operation (Red)
Plasmacluster

(Blue)
7 0
Plasmacluster
(Blue)
1
Plasmacluster

(Blue)
2
Plasmacluster

(Blue)
3
Plasmacluster
 
(Blue)
Content of diagnosis
Main Sub
Dry opera- Temporary stop (Temporary stop for cycle
tion due to dehumidi- protection)
fying operation
Outdoor unit Heat exchanger
thermistor thermistor open
open-circuit circuit error
Outdoor temper-
ature thermistor
open circuit error
Suction ther-
mistor open cir-
cuit error
2-way valve ther-
mistor open cir-
cuit error.
Discharge ther-
mistor open cir-
cuit error
Heat sink ther-
mistor open cir-
cuit error
Outdoor unit DC over current Go to "DC Over Current Error (6-0 error)".
DC Current error
IPM pin level
error
Outdoor unit AC over current
AC Current error
AC current error
when OFF
AC maximum
current error
AC current defi-
ciency error
3 – 16
Check point
(1) Check connector of (1) Correct the instal-
the outdoor unit ther- lation.
mistor for secure
installation.
(2) Measure resistance (2) Replace the out-
of outdoor ther- door unit ther-
mistors. mistor assembly.
(3) Check the lead wires (3) Replace the out-
of thermistors on the door unit ther-
outdoor unit control mistor assembly.
PCB for open-circuit.
(4) (1) (2) (3):Normal (4) Replace the out-
door unit control
PCB assembly.
(1) Check the IPM is (1) Replace the out-
attached correctly to door unit IPM PWB
the outdoor unit IPM assembly.
PWB.
(1) Ensure unob- (1) Ensure unob-
structed air flow from structed air flow
the outdoor unit air from the outdoor
outlet. unit air outlet.
(2) Check the outdoor (2) Check the outdoor
unit fan motor. unit fan motor.
(1) IPM continuity check (1) Replace the out-
door IPM PWB
(1) Ensure unob- (1) Ensure unob-
structed air flow from structed air flow
the outdoor unit air from the outdoor
outlet. unit air outlet.
(2) Check the outdoor (2) Check the outdoor
unit fan motor. unit fan motor.
(1) Replace the outdoor (1) Replace the out-
unit control PCB door unit control
assembly. PCB assembly.
(2) Charge the speci- (2) Charge the speci-
fied amount of refrig- fied amount of
erant. refrigerant.
(3) Correct refrigerant (3) Correct refrigerant
clogs. (Stop valve, clogs. (Stop valve,
pipe, expansion pipe, expansion
valve) valve)
Action
-