Chapter 3. Troubleshooting; Troubleshooting Guide - IVT GS-XP12HR-N Service Manual

CHAPTER 3.
GSXP12HRN TROUBLESHOOTING

[1] TROUBLESHOOTING GUIDE

1. SELF-DIAGNOSIS FUNCTION AND DISPLAY MODE
1) To call out the content of the self-diagnosis memory, hold down the emergency operation button for more than five seconds when the indoor unit is
not operating.
a) According to the content of the self-diagnosis memory, the Operation LED (main category) and the Plasmacluster Ion LEDs (sub-category)
flash in sync with the Timer LED on the indoor unit.
b) In the event a complete shutdown occurs due to a malfunction, the Operation LED (red), Timer LED (yellow) and Plasmacluster Ion LED (blue)
flash to indicate the general information of the generated malfunction.
c) If the power cord is unplugged from the AC outlet or the circuit breaker is turned off, the self-diagnosis memory loses the stored data.
2) Display of detailed self-diagnosis result with main category and sub-category indications
When malfunction information is called out, the main category and sub-category of the self-diagnosis result are indicated by the Operation, Timer,
and Plasmacluster Ion LEDs on the indoor unit.
* 1:Example of self-diagnosis result displayed on indoor unit: Suction thermistor open-circuit error
*1: Example of self-diagnosis result displayed on indoor unit: Suction thermistor open-circuit error
Timer LED [yellow]
Operation LED [red]
Plasmacluster Ion LED [blue]
* 2:The self-diagnosis display function of the outdoor unit indicates the error information by flashing LED1 on the outdoor unit according to the
content of self-diagnosis.
The self-diagnosis display function of the outdoor unit is active only for about 3 to 10 minutes after self-diagnosis is performed during operation,
and the display returns to normal condition after this display period.
The content of self-diagnosis cannot be called out by the self-diagnosis display function of the outdoor unit.
Example of self-diagnosis display on outdoor unit : Compressor high-temperature abnormality
* 3:The content of diagnosis is transferred to the indoor unit via serial communication, but it does not trigger a complete shutdown operation.
: Flashes in 2-sec intervals (normal),
Indication by operation lamp on indoor unit
Indication by
Status of
LED1 on
indoor/outdoor
Lighting pattern at the time of timer lamp lighting
outdoor unit
units
*2
Indoor/outdoor Normal
units in flashing
operation
Indoor/outdoor
1 time
units in
complete
shutdown
Indoor/outdoor
2 times
units in
complete
shutdown
Indoor unit in
operation
Outdoor unit in
temporary stop
Indoor unit in
3 times
operation
Outdoor unit in
temporary stop
Basic flashing cycle due to error
ON
OFF
Figures in ( ) indicate numbers (binary notation) assigned based on the flashing sequence.
ON
Flashing for main category indication
OFF
Flashing for sub-category indication
1 sec 1 sec 0.6 sec 1 sec 0.6 sec
ON
OFF
: On, : Off, : Flashes 3 times in 0.2-sec intervals
(When LED1 on the outdoor unit flashes in 2-sec intervals, the outdoor unit is in normal condition.)
Malfunction No.
Main Sub-
Off for 5 seconds
category category
0
Operation lamp
(RED)
1
Cluster lamp
(BLUE)
Operation lamp
(RED)
Cluster lamp
(BLUE)
Operation lamp
(RED)
Cluster lamp
(BLUE)
Operation lamp
(RED)
Cluster lamp
(BLUE)
Operation lamp
(RED)
2
Cluster lamp
(BLUE)
Operation lamp
(RED)
Cluster lamp
(BLUE)
Operation lamp
(RED)
Cluster lamp
(BLUE)
Operation lamp
(RED)
Cluster lamp
(BLUE)
Operation lamp
(RED)
Cluster lamp
(BLUE)
Operation lamp
(RED) 3
Cluster lamp
(BLUE)
Service Manual
1 sec 1 sec 1 sec 5 sec
1 sec 1 sec 1 sec 0.6 sec 1 sec 0.6 sec 1 sec 1 sec
Content of diagnosis
Main
Sub-category
category
Normal
0
Heat exchanger (1) Measure resistance of the outdoor unit
Outdoor unit
-0
thermistor short-circuit thermistors.
thermistor
error (TH2 to TH5: Approx. 4.4 k at 25¼C)
short-circuit
(2) Check the lead wire of the outdoor unit
Outside temperature
thermistor for torn sheath and short-
-1
thermistor short-circuit
circuit.
error
(3) No abnormality found in above
Suction thermistor
inspections (1) and (2).
-2
short-circuit error
2-way valve thermistor
-3
short-circuit error
Cycle Compressor high- (1) Check the outdoor unit air outlet for
-0
temperature temperature error
blockage.
(2) Check if the power supply voltage is
198V or higher at full power.
(3) Check the pipe connections for
refrigerant leaks.
(4) Measure resistance of the outdoor unit
compressor thermistor.
(TH1: Approx. 53 k at 25¼C)
(5) Check the expansion valve for proper
operation.
Temporary stop due to
(Temporary stop for cycle protection)
-1
compressor discharge
overheat *3
Temporary stop due to
(Temporary stop for cycle protection)
-2
outdoor unit heat
exchanger overheat *3
Temporary stop due to
(Temporary stop for cycle protection)
-3
outdoor unit heat
exchanger overheat *3
temporary stop due to
(Temporary stop for cycle protection)
-4
2-way valve freeze *3
Dry Temporary stop due to
(Temporary stop for cycle protection)
-0
operation dehumidifying
operation *3
3 – 1
Main category Sub-category
Malfunction No.
Inspection location/method
(1) Replace the outdoor unit
thermistor assembly.
(2) Replace the outdoor unit
thermistor assembly.
(3) Replace the outdoor unit control
PCB assembly.
(1) Ensure unobstructed air flow from
the outdoor unit air outlet.
(2) Connect power supply of proper
voltage.
(3) Charge the specified amount of
refrigerant.
(4) Replace the outdoor unit
compressor thermistor assembly.
(5) Replace the expansion valve coil,
expansion valve or outdoor unit
control PCB assembly.
GSXP12HRN
Remedy