Heidolph Hei-VAP Expert Operating Manual page 60

Troubleshooting
Vapor temperature
is not displayed
Automatic mode
(DAA) cannot be
selected
Control box not
connected or
defective
Ventilation valve
defective
Vacuum valve
not attached or
defective
Vacuum pump
not attached or
defective
Vapor temperature sensor
not attached
Vapor temperature sensor
defective
Temperature is outside of
measuring range
AUTOaccurate sensor not
attached
AUTOaccurate sensor
defective
Temperature outside of
measuring range
Control box not connected
or defective
Short circuit in the venti-
lation valve
Vacuum valve is not
attached or the connec-
tion between control
box and vacuum valve is
interrupted
Short circuit in the
vacuum valve
Vacuum pump is not
attached or the connec-
tion between control box
and vacuum pump is
interrupted
▪ Attach vapor temperature sensor or
check connection
▪ If needed, switch the device off and
on again
▪ Inspect vapor temperature sensor
for defects
▪ Contact service, if needed, replace
sensor
Let sensor warm up or cool down
▪ Attach AUTOaccurate sensor or
check connection
▪ if needed, switch the device off and
on again
▪ Inspect AUTOaccurate sensor for
defects
▪ Contact service, if needed, replace
sensor
Let sensor warm up or cool down
▪ Check connection between control
box and evaporator
▪ Contact service
Contact service
▪ Connect vacuum valve
▪ Check connection between control
box and vacuum valve
▪ Contact service
Contact service
▪ Attached vacuum pump
▪ Check connection between control
box and vacuum pump
60