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MICOM FUNCTION AND CIRCUIT DIAGRAM
6-1-9. Malfunction Diagnosis Function
1. This function is to facilitate SVC at a time of a problem during an operation.
2. Even when a problem occurs, display buttons and LED will operate in normal condition. You can identify the problem by
pressing both ' ' and ' ' button. The display will indicate the problem for 5 seconds.
NOTE: In case of a communication error, the problem will automatically be displayed on the bottom temperature
setting LED.
3. For every sensor malfunction (top, top EVA, bottom, bottom EV, Exterior sensor), all of the appropriate malfunction
indications will be displayed even when more than 2 sensors are malfunctioning.
4. In case of a communication error, the communication error has the priority. Sensor malfunction indication will not be
displayed during a communication error display.
5. Sensor malfunctions and communication error indications
NO
Malfunctions
1
Top sensor malfunction
2
Top EVA sensor malfunction
3
Bottom sensor malfunction
4
Bottom EVA sensor malfunction
Exterior sensor malfunction
5
Communication
6
malfunction
6-1-10. TEST Function
1. Test function allows PCB and product function check, and malfunctioning part identification.
2. TEST S/W is on the MAIN PCB. Test mode resumes normal operation after 2 hours.
3. After you terminate the test mode, you have to unplug the power in order to resume the normal mode.
MODE
Operation
TEST1
Press TEST S/W once
Press TEST S/W once
TEST2
from TEST1
Press TEST S/W once
TEST3
from TEST2
Resume
Each test mode resumes the initial state after two hours
Normal
When resuming from the test mode, operation will activate after 5 minutes COMP delay
Operation
A part
B part
C part
8
E
ON
E
8
ON
8
8
ON
8
8
ON
8
8
OFF
OFF
OFF
OFF
COMP
VALVE
ON
Top valve OPEN
ON
Bottom valve OPEN
TOP 45min / Bottom
ON
15min switchover
- 24 -
D part
E part
8
8
Cut wire or short circuit in top sensor
8
8
Cut wire or short circuit in top EVA sensor
8
E
Cut wire or short circuit in a bottom sensor
E
8
Cut wire or short circuit in a bottom EVA sensor
8
8
Cut wire or short circuit in an exterior sensor
No communication in 30 consecutive seconds (connector
C
O
unplugged, defected TR in communication part)
DISPLAY LED
P1
Checking for top part's cooling system
Checking for bottom part's cooling
P2
system
Checking for top/bottom part's cooling
P3
system
Conditions
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