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Service and troubleshooting
Operating instructions (Version F)
55
ST 1082 & ST 1100
7
20
Keyboard fault A button has been
pressed when
starting. Short circuit
on the PCB.
Turn
OFF
and
ON
on the
main switch(s) and press the
<SELECT> button to ensure
the system can again be
used. Replace the PCB if
required.
25
24V during
start-up
detected
Main safety relay
faulty.
Check the main safety relay.
Replace the main safety
relay if necessary.
31
Output
lowering valve
fault
Broken wire/short
circuit in lowering
valve.
Check the lowering valve
circuit.
32
Output
unlocking
solenoid fault
Broken wiring/short
circuit in drop-
safeguard unlocking
solenoid.
Check the circuit of the
unlocking solenoid.
33
Output
correction
valve fault
Broken wire/short
circuit in the
correction valve.
Check the circuit of the
correction valve.
35
Motor relay
fault
Broken wire/short
circuit in the motor
relay.
Check the cabling to A1 and
A2 of the motor relay.
36
Output power
supply fault
Defective power
supply to outputs.
Set the main switch(s) to
OFF
.
Check and replace fuse F2
(3.15 A) if required. Also
check the thermal relay and
reset it if required. Turn on
the control box again using
the standard procedure. If
the fault occurs again,
contact the technical service.
37
Short circuit on
PCB
Short circuit on the
PCB.
Allow damp box to dry.
Replace PCB if the fault
persists.
Table 7.1
Error codes
Error code Code/label
Possible cause
Solution