Solartech PD600 User Manual

PD series of solar DC pumping controller operation manual Installation and Wiring
7
Normally-Open Normally-Close
Water level
Over H_high
Closed Opened
Water level
Under H_low
Opened Closed
Fig. 2-3Water level float types
●
Float fault:
The water level float may not work properly if the wire is in a bad
connection or the signal wire is disconnected due to wearing wire.
●
Water level float for well:
If use Normally-Close type, the signal wire will always
be disconnected no matter the water level is normal or the float is broken. So when
the float is broken, and water level in well is too low, the pump may get damaged due
to dry running since the controller judges the water level is normal.
Use Normally-Open type, no matter the water level is too low or the float is broken,
the controller can judge the water level abnormal and stop the operation to protect the
pump.
●
Water level float for tank:
If use Normally-Close type, the signal wire will always
be disconnected no matter the water level is too high or the float is broken. So when
the float is broken, and water level in tank is normal, the system will stop operation
since the controller judges the water level is too high.
Use Normally-Open type, the system will still produce water even when the float is
broken, but the system will not report abnormal when the water tank level is too high.
When user finds there is overflow from water tank, please examine the float
condition.
Warning:
To ensure stable operation of system, please choose cable size
according to our recommendation as below.
 Recommended cable size
Model
Solar Array Cable
(P, N)
(mm
2
)
Earth Wire
(PE)
(mm
2
)
Pump Cable
(U, V, W)
(mm
2
)
Water Level
Float Wire
(S)
(mm
2
)
PD600 2.5 2.5
≥
2.5
0.5 ~ 1.5

Solartech PD600 Specifications

General

Brand	Solartech
Model	PD600
Category	Controller
Language	English