IVT 09LR-N Service Manual page 39

Problem Outdoor
symptom unit indi-
cation
(LED1)
Indoor and 8-time      Timer (Orange)
outdoor units

do not oper-
ate.
Indoor and 9-time      Timer (Orange)
outdoor units

do not oper-
ate.
Indoor and      Timer (Orange)
outdoor units

do not oper-
ate.

Indoor and 10-time      Timer (Orange)
outdoor units

do not oper-
ate.
Indoor and      Timer (Orange)
outdoor units

do not oper-
ate.
Indoor and      Timer (Orange)
outdoor units

do not oper-
ate.
Indoor unit Malfunc-
tion No.
Lamp Main Sub
8 0
Operation (Red)
Plasmacluster
(Blue)
9 0
 Operation (Red)
Plasmacluster
(Blue)
4
 Operation (Red)
Plasmacluster
(Blue)
10 0
 Operation (Red)
Plasmacluster
(Blue)
1
 Operation (Red)
Plasmacluster

(Blue)
2
 Operation (Red)
Plasmacluster

(Blue)
Content of diagnosis
Main Sub
Abnormal Abnormal wire
wire check check error
Cycle tem- Thermisttor
perature installtion error or
4-way valve
error.
4 way valve error
or Gas leak error
EEPROM EEPROM (out-
error door) data error
EEPROM (out-
door) data error
CPU (outdoor)
RAM data error
3 – 17
Check point
(1) Check the expansion (1) Replace the out-
valve. (unit A - C) door control board
assembly.
(2) Are four expansion (2) Reattach
valves connected by
mistake
(3) Check the wiring (3) Check the wiring
between units. between units.
(1) Check the ther- (1) Correct the instal-
mistor (heat lation.
exchanger) and (2-
way valve) are
installed in correct
positions.
(2) Check if the refriger- (2) Change the speci-
ant volume is abnor- fied amount of
mally low. refrigerant.
(3) Check the 4-way (3) Replace the 4-way
valve for proper valve.
operation.
(4) No abnormalyty (4) Replace the out-
found in above door unit control
inspections (1) thro- PCB assembly.
hgh (3).
(1) Check the ther- (1) Correct the instal-
mistor indoor/out- lation.
door exchange are
installed in correct
portions.
(2) Check if the refriger- (2) Change the speci-
ant volume is abnor- fied amount of
mally low. refrigerant.
(3) Check the 4-way (3) Replace the 4-way
valve for proper valve.
operation.
- (1) Replace the out-
door unit control
PCB assembly.
12LRN
Action