6
TROUBLESHOOTING
7. TROUBLESHOOTING
Problem
Possible cause
Solution
Leveler does not
rise (pump does not work)
No supply voltage
Check the electrical wires
and the voltage in the socket
Faulty power switch
Replace main power switch
Blown fuse
Replace fuse (FU1, FU2)
Faulty contactor
Replace main board
No power to the contactor coil
Replace main board
No jumper on terminals
for safety devices
Set the jumper
Interlock switch open
Check the interlock
Leveler does not respond to pressing the
control button
Replace control board
Leveler does not
rise (pump works)
Incorrect phasing
Swap any two phases in the control unit
Leveler does not lower
No power to the electromagnetic valve coil
Check wiring from control unit to coil.
Check coil voltage (24 VDC)
Replace main board
Faulty electromagnetic valve coil or valve
Replace coil or valve
Table 7.1. Possible faults, their causes and solutions
