5
– FUNCTIONING AND USE
COD: 500M380.D.2018
EN
THE PRESENT MANUAL BELONGS TO -
Schenker Italia
- ALL RIGHTS RESERVED
39
5.2 Preliminary check
– Motors rotation
Before proceeding with the start-up of the unit, it must be carefully verified the rotation direction of the motors
of the pumps. This is a standard procedure for all the three phase motors. The procedure is the following:
1.
Look at the rear of the motor of the main pump;
2.
Start for few seconds the motor, pushing with a screw driver the push button of the pump 2 relay
(K2M).
3.
Check the rotation direction of the motor. It must be clockwise, accordingly to the arrow.
4.
If the rotating direction is counter clockwise, swap each other the connections to L1 and L3 and check
again.
Motors rotation check
Fig. 5.2
5.3 Introduction
– by pass mode
The by-pass mode disables the low pressure and the cycling controls. Then the watermaker can work but not
in a safe condition, and has to be directly and continuously monitored.
The bypass mode has to be activated only in the following situations:
1. Chemical washing. The by-pass is necessary to avoid low pressure blocks.
2. Probe (signal pressure switch) fault. In this case the system gets an alarm (SYSTEM BLOCKED
message) because the probe gives to the controller a false indication, not because a real problem is
exsisting. The bypass mode allows the watermaker to by-pass the sensor and work.
CAUTION
Please, avoid to use the bypass mode if not strictly necessary. In this mode all the main electronic
controls of the watermaker and automatic sensors are disabled.
