Heidolph 036308001, Operating Instructions Manual

Page: 139 / 157

139
Fault
`
Possible cause
3
Remedy
Personnel
No display
`
Controller switched off.
`
Power supply disconnec-
ted.
`
Power supply not cor-
rectly connected.
`
Mains voltage failure.
`
Controller defective
`
Cable break.
3
Switch on the controller;
On/Off key.
3
Check plug connection
and wall power supply for
correct connection.
3
Replace defective parts.
3
Contact service and
3
return device for repair.
Specialist
Blank display
`
Too many devices con-
nected, e. g., valves.
3
Power input of all con-
nected devices may not
exceed the maximum
power consumption of the
controller:
- controller with wall power
supply max. 30 W,
- Cont VARIO
max. 25 W.
respon.
Specialist
`
Short circuit of a connec-
ted device.
3
Replace defective parts.
`
Short circuit at RS232
interface.
`
Controller defective
3
Check RS232 plug con-
nection.
3
Contact Service and
3
return device for repair.
Incorrect pressure
display
`
Humidity inside the
vacuum sensor.
`
Vacuum sensor soiled.
`
Vacuum sensor not
adjusted.
`
Vacuum sensor not cor-
rectly adjusted.
3
Identify and remove
source of humidity.
3
Dry the vacuum sensor,
e. g., by pumping down.
3
Clean the vacuum sensor,
see chapter . 9.1 Cleaning
on page 144.
3
Readjust vacuum sensor.
User,
Specialist
Digital pressure gauge
flashes
`
Pressure display flashing
with 0.0:
- vacuum adjustment not
correctly carried out.
`
Pressure display flas -
hing:
- Overpressure! Pres-
sure > 1060 mbar.
3
Readjust internal or exter-
nal vacuum sensor,
see
chapter .
9.2 Sensor read-
justment on page 145.
WARNING!
Risk of bursting.
>
Discharge the system imme-
diately by venting.
Specialist
No digital pressure
reading
`
External vacuum sensor
defective.
`
External vacuum sensor
removed.
`
Internal vacuum sensor
defective.
3
Replace defective parts.
3
Reconnect external
vacuum sensor.
3
Contact Service and
3
return device for repair.
respon.
Specialist