LG GR-J303TS Service Manual - Page 14

Test Function

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3-1-14. TEST FUNCTION 1. Test function is intended to check function of PCB and the product and find a failure part with failure status. 2. The test S/W exists on the main PCB, and ends the test mode after 2 hours irrespective of the test mode, and then returns to normal status. 3. Function button is neither detected, nor button recognition sound comes out during the test mode. 4. Ensure to take the power cords out in completion of the test mode so that normal status will be arrived. 5. Release the test mode and display the failure mode if failure such as sensor failure during the test mode. 6. No test mode is performed even when pressing the test button during display of failure code. MODE TEST1 OPERATION Press the test S/W once DETAILS REMARKS 1. COMP (* Fan motor at machine room) ON 2. Defrost heater OFF at upper, middle compartment. 3. FRONT-C heater OFF 4. Fan motor at upper/middle compartment, damper at middle/lower compartment and 3-way valve operates to cool the upper/middle&lower compartment in interval of 16/24 minute. 5. For display, the only "Min" LED of the upper room turns on. Returns to normal status when maximum 2 hours have passed. TEST2 Press the test S/W once in the test mode 1 1. COMP (* Fan motor at machine room) OFF 2. Fan motor OFF at upper, middle compartment 3. Defrost heater ON at upper, middle compartment 4. FRONT-C heater ON 5. All dampers at middle, lower compartment are closed. 6. 3-way valve maintains previous status. 7. For display, the only "MIN" LED of the upper room turns on. Defrost sensor at the upper compartment performs initialization at more than 7 °C, and middle defrost sensor at more than 16 °C (COMP delay for 7 minutes) Normal status Press the test S/W 3 Returns to initial status times in the test mode 2 COMP operates after delay for 7 minutes • LED check function All LEDs turn on if pressing both upper "Store" button and middle "Store" button at the same time for 1 second or more, and display the previous status if releasing the button. • FRONT-C Heater touching inspection mode The FRONT-C heater consecutively turns on for 5 minutes and is then released if pressing both upper "Store" button and lower "Ferment" button for 5 seconds or more. It is released if pressing them again for 5 senconds or more. - Release check: LED on the remainder time display part of the lower compartment turns on with pressing for 5 seconds or more. - Input check: LED on the flavor keeping part turns on with pressing for 5 seconds or more. - 14 -

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3-1-14. TEST FUNCTION
1. Test function is intended to check function of PCB and the product and find a failure part with failure status.
2. The test S/W exists on the main PCB, and ends the test mode after 2 hours irrespective of the test mode, and then
returns to normal status.
3. Function button is neither detected, nor button recognition sound comes out during the test mode.
4. Ensure to take the power cords out in completion of the test mode so that normal status will be arrived.
5. Release the test mode and display the failure mode if failure such as sensor failure during the test mode.
6. No test mode is performed even when pressing the test button during display of failure code.
• LED check function
All LEDs turn on if pressing both upper “Store” button and middle “Store” button at the same time for 1 second or more,
and display the previous status if releasing the button.
• FRONT-C Heater touching inspection mode
The FRONT-C heater consecutively turns on for 5 minutes and is then released if pressing both upper “Store” button and
lower “Ferment” button for 5 seconds or more. It is released if pressing them again for 5 senconds or more.
- Release check: LED on the remainder time display part of the lower compartment turns on with pressing for 5 seconds or
more.
- Input check: LED on the flavor keeping part turns on with pressing for 5 seconds or more.
- 14 -
MODE
OPERATION
DETAILS
REMARKS
TEST1
TEST2
Normal
status
Press the test S/W
once
Press the test S/W
once in the test mode 1
Press the test S/W 3
times in the test mode 2
1. COMP (* Fan motor at machine room) ON
2. Defrost heater OFF at upper, middle compartment.
3. FRONT-C heater OFF
4. Fan motor at upper/middle compartment, damper
at middle/lower compartment and 3-way valve
operates to cool the upper/middle&lower
compartment in interval of 16/24 minute.
5. For display, the only “Min” LED of the upper room
turns on.
1. COMP (* Fan motor at machine room) OFF
2. Fan motor OFF at upper, middle compartment
3. Defrost heater ON at upper, middle compartment
4. FRONT-C heater ON
5. All dampers at middle, lower compartment are
closed.
6. 3-way valve maintains previous status.
7. For display, the only “MIN” LED of the upper room
turns on.
Returns to initial status
Returns to normal status
when maximum 2 hours
have passed.
Defrost sensor at the
upper compartment
performs initialization at
more than 7 °C, and
middle defrost sensor at
more than 16 °C (COMP
delay for 7 minutes)
COMP operates after
delay for 7 minutes