14
FAULTS
If a fault occurs that stops the controller running the backlight on the screen will flash rapidly and the fault description and
fault number will be displayed. Please write down this number as it will provide Sema Ltd., with important information about
the cause of the fault.
If a fault occurs turn off the power, wait until the controller screen is completely dark and then turn the power back on again. If
the fault is still present then contact your Dealer or Sema Ltd.
Possible Faults:
Short Circuit. Check the motor cable and the motor for electrical faults
Motor Overloaded. Check that the pump isn’t jammed. Attempt a reset by turning the power off and back on
again. When the motor starts observe its running current (middle figure on the main running screen) and ensure that it is less
than the nameplate current.
Over Voltage. Contact your power company. This will damage the controller it it’s allowed to continue.
Under Voltage. The controller cannot run because there is insufficient power. Contact your power company.
Too Hot. The controller is overheated. Check that the cooling fins are not blocked and that the air temperature is not
above 40 degrees Celsius.
Too Cold. The controller must be above –10 degrees Celsius before it will start. If the air temperature is less that this then
gently warm the controller until it is able to start, once it has started it should generate enough internal heat to keep running.
Maximum Run Time Exceeded. The pump has run continuously for more than the maximum allowed run
time. Usually this is caused by a water leak. Pushing the on/off button restarts the pump and resets the timer.
LoP (Loss of Prime or Pump Running Dry). Make sure that the pump has water available. Press the
On/Off button to restart the pump.
External Cut-out Tripped. One or more of the external cut-outs connected between terminals 1 and 4 has
tripped. Typically these will be things like a low water level sensor or a pump thermal trip.
Transducer Fault. Either the Transducer is faulty or there is a fault in the Transducer wiring (Might pay to check the
plug on the transducer to make sure that it’s properly plugged in!). If you can’t rectify the problem then you can run the con-
troller in ‘Emergency Mode’ from a pressure switch. See below:
Emergency Mode: If the Transducer fails the WPC will stop. This is done to prevent possible over pressurising of the
system. Because a Transducer isn’t a device which is readily available in all parts of the world an Emergency Mode
has been provided to enable the unit to run from a pressure switch.
To activate Emergency Mode:
1. 1. Turn off the power and wait until the screen is dark .
2. 2. Connect a Pressure Switch between terminals 1 & 2 (It doesn’t matter whether you leave the pre-installed
white wire in terminal 2 or not.)
3. 3. Turn on the power and the unit will now detect the Pressure Switch, it will respond by activating its emer-
gency mode and act as an on/off controller in response to the input from the pressure switch.
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