IVT 09LR-N Service Manual page 37

<INDOOR UNIT> :1-second ON / 1-second OFF
Problem Outdoor
symptom unit indi-
cation
(LED1)
Normal con- Normal      Timer (Orange)
dition blinking
Indoor and 1-time      Timer (Orange)
outdoor units
do not oper-
ate.
     Timer (Orange)
     Timer (Orange)
     Timer (Orange)
Indoor and 2-time      Timer (Orange)
outdoor units
do not oper-
ate.
Indoor unit      Timer (Orange)
operates.
Outdoor unit
does not
operate tem-
     Timer (Orange)
porarily.
     Timer (Orange)
     Timer (Orange)

Indoor and      Timer (Orange)
outdoor units
do not oper-
ate.

Indoor unit Malfunc-
tion No.
Lamp Main Sub
0 0
Operation (Red)
Plasmacluster
(Blue)
1 0
 Operation (Red)
Plasmacluster
(Blue)
1
 Operation (Red)
Plasmacluster

(Blue)
2
 Operation (Red)
Plasmacluster

(Blue)
3
 Operation (Red)
Plasmacluster
 
(Blue)
2 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)
Content of diagnosis
Main Sub
Normal
Outdoor unit Heat exchanger
thermistor thermistor short
short-circuit circuit error
Outdoor temper-
ature thermistor
short circuit error
Suction ther-
mistor short cir-
cuit error
2-way valve
thermistor short
circuit error
Cycle tem- Compressor high
perature temperature
error
Compressor dis- (Temporary stop for cycle
charge overheat. protection)
Outdoor unit heat (Temporary stop for cycle
exchanger over- protection)
heat.
Indoor unit heat (Temporary stop for cycle
exchanger over- protection)
heat.
IPM high temper- (Temporary stop for cycle
ature error protection)
IPM high temper-
ature error
3 – 15
Check point
(1) Measure the resis- (1) Replace the out-
tance of the outdoor door unit ther-
unit thermistors. mistor assembly.
(2) Check the lead wire (2) Replace the out-
of the outdoor unit door unit ther-
thermistor for torn mistor assembly.
sheath and shortcir-
cuit.
(3) (1) (2):Normal (3) Replace the out-
door unit control
PCB assembly.
(1) Check the outdoor (1) Ensure unob-
unit air outlet for structed air flow
blockage. from the outdoor
unit air outlet.
(2) Check if the power (2) Connect power
supply voltage is AC supply of proper
230V at full power. voltage.
(3) Check the pipe con- (3) Charge the speci-
nections for refriger- fied amount of
ant leaks. refrigerant.
(4) Measure resistance (4) Replace the out-
of the outdoor unit door unit compres-
compressor ther- sor thermistor
mistor. assembly.
(5) Check the expansion (5) Replace the
valve for proper expansion valve
operation. coil, expansion
valve or outdoor
unit control PCB
assembly.
(1) Measure resistance (1) Replace the out-
of the heat-sink ther- door unit PFCM
mistor. PWB or control
PCB assembly or
change the heat-
sink thermistor.
12LRN
Action
-
-
-
-