dooch N747D, Руководство пользователя, Страница: 55 / 65

BOOSTER PUMP SYSTEM
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BOOSTER PUMP SYSTEM N747D
2. Check items
1. No operation is started when powered ON;
⑴
Check power voltage (208V~440V).
⑵
Check power, wire short and contact terminals.
2. When powered ON, only LCD Back Light is turned on;
⑴
Turn VR counterclockwise with PIN driver.
⑵
Check cables connected to LCD.
3. No front Key works;
⑴
Check cables connected to control board Key.
4. After set front panel switches for pump #1, Pump #2 and Pump #3
at AUTO position, no pump is not identified on the LCD screen;
⑴
Check switch contact points.
⑵
Verify the shortages of 5. PENT and 12. CG wire of Pump-OPT
board.
⑶
Check the contact point of 5. PENT and 12. CG wire of Pump-
OPT board.
(Verify LED ON state of Pump-OPT board.)
5. “Start/Stop” switch of the front panel does not work;
⑴
Check switch contact points.
⑵
Verify the shortages of 20.CG and 25. Run wire of main board.
⑶
Verify the contact points of 20.CG of main board and 25. Run
wire. (Verify LED ON state of main board.)
6. The output of inverter is not sufficient;
(EX. While front LCD shows 100%, internal inverter operates in
50Hz.)
⑴
Adjust DAC value in installer’s settings.
7. While the inverter is displayed on front LCD, pump does not work;
⑴
Check wire shortage and contact points of 18.RI0C and
19.RI0A of main board.
⑵
Verify if any short raises in 18. RI0C and 19. RI0A wire. ( RUN
signal work when short)
⑶
Verify the shortages and contact points of 35.VO0 and
36.CGwire.
⑷
Check DC voltage of 35. VO0 and 36. CG wire in main board.
(EX. DC 5V = 30Hz, DC10V = 60Hz)