dooch N747D, Руководство пользователя, Страница: 57 / 65

BOOSTER PUMP SYSTEM
57
BOOSTER PUMP SYSTEM N747D
17. Auto-operation is not available in low pressure alarming;
⑴
Set the pressure time of low pressure alarm more than 10
seconds, then stop the front panel “START/STOP” switch and re-start.
⑵
Set one of the front panel switch of pump 1, pump 2, pump 3
and pump 4 as MANU, so that one pump can be started and
increases the pressure up to the low alarm setting pressure.
18. Control of inverter is not available;
⑴
Check the inverter control method - voltage method, or current
control method;
⑵
If inverter control method is by current, check whether the J3
switch of main board is Iout direction. If the control method is by
voltage, it should be opposite direction ( Ex-factory default setting
is voltage control method).
3
.
Pump test operation
Thank you for your selection of our boost pump system.
In this section, check items, procedures and manuals for test
operation are summarized for our boost pump users.
The least items to be entered essentially for test operation
must be entered.
1. Check items before test operation
- Check site circumstance
1) Is water sufficient in water tank?
2) Is power connected?
3) Is the piping connection well?
2. Procedure of pump test operation
Before the site test operation, make sure to confirm below
items.
1) Has water been supplied to the site?
2) Is the wiring of panel and motor well connected.
3) Is the power supplied?
3. Manual for boost pump system test operation
1) Check if water is sufficient in the water tank.
2) Check if power cables of motor and panel are connected.
3) Open the water tank valve and inlet/outlet valves of pump.