IVT 09LR-N, Service Manual

Page: 40 / 64

12LRN
3 – 18
Indoor and
outdoor units
do not oper-
ate. 11-time      Timer (Orange) 11 0 Outdoor unit
DC fan Outdoor unit DC
fan rotation error (1) Check connector
CN3 of the outdoor
unit DC fan motor for
secure installation.
(1) Correct the instal-
lation.
   Operation (Red)
Plasmacluster
(Blue)
(2) Check the outdoor
unit fan motor for
proper rotation.
(2) Replace the out-
door unit fan
motor.
(3) Check fuse FUSE5. (3) Replace the out-
door unit control
PCB assembly.
(4) Outdoor unit control
PCB
(4) Replace the out-
door unit control
PCB assembly.
     Timer (Orange) 1 Outdoor unit DC
fan drive IC error (1) Check if the fan IPM
terminal resistance
values are uniform.
(1) Replace the out-
door unit control
PCB assembly.
   Operation (Red)

Plasmacluster
(Blue)
(2) Outdoor unit fan
motor continuity
check.
(2) Replace the out-
door unit fan.
     Timer (Orange) 2 Outdoor unit DC
fan lock error (1) Check the outdoor
unit fan motor for
proper rotation.
(1) Replace the out-
door unit control
PCB assembly.
   Operation (Red)

Plasmacluster
(Blue) (2) (1):Normal (2) Replace the out-
door unit fan.
     Timer (Orange) 3 Detection error of
DC fan negative
rotation before
compressor is
driven (1) (Temporary stop for
DC fan circuit protec-
tion)
-
   Operation (Red)
 
Plasmacluster
(Blue)
     Timer (Orange) 4 Detection error of
inverter current
for DC fan - (1) Replace the out-
door unit control
PCB assembly.
   Operation (Red)

Plasmacluster
(Blue)
    
Timer (Orange) 5 Outdoor unit DC
fan open con-
nector error (1) Check connector
CN3 of the outdoor
unit DC fan motor for
secure installation.
(1) Correct the instal-
lation.
   Operation (Red)
 
Plasmacluster
(Blue)
(2) (1):Normal (2) Replace the out-
door unit control
PCB assembly.
Indoor and
outdoor units
do not oper-
ate. 12-time      Timer (Orange) 12 0 Thermal
fuse in ter-
minal board Thermal fuse
error in terminal
board (for power
supply) (1) Check the thermal
fuse in terminal
board (for Power
supply)
(1) Replace terminal
board for Power
supply
  Operation (Red)
Plasmacluster
(Blue)
(2) Check connector
CN5 of the outdoor
unit.
(2) Correct the instal-
lation.
(3) (1) (2):Normal (3) Replace the out-
door unit control
PCB assembly.
Problem
symptom
Outdoor
unit indi-
cation
(LED1)
Indoor unit Malfunc-
tion No.
Content of diagnosis Check point Action
Lamp Main Sub Main Sub