stertil ST1175, Service Manual

Page: 71 / 108

Operation & Service Manual (VA) 71 ST1175
Error
code
Code/label Possible cause Solution
16 Potentiometer
not calibrated Potentiometers
outside the
calibration limits. Calibrate the potentiometers
again using program code
67. Check that the columns
remain horizontal when
raising and lowering. They
must be horizontal to
within 5/8". If the difference
is greater than 5/8", the
potentiometers must be
replaced.
See section Programmable
settings (on page 59).
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 be used
again. Replace the PCB if
required.
25 24V during
startup 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.