DoorHan DCUH-1 Owner's Manual

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

DoorHan DCUH-1 Specifications

General

Brand	DoorHan
Model	DCUH-1
Category	Control Unit
Language	English