Operating manual VISATRON® Oil Mist Detector VN2020 / VN2020 EX
Part number 183001 Version 3.0
ERROR DIAGNOSIS AND TROUBLESHOOTING
Type of
fault/possible causes
08/electronics
temperature
too high
(> 85°C)
Device is not ready
for operation
▪ Ambient temperature too
high
1. Remove or relocate objects nearby
emitting heat
2. Install metallic heat shields to shield
again heat radiation
09/electronics
temperature
too low
(< -0°C)
Device is not ready
for operation
Ambient temperature too low
1. Bring within allowed range of operating
temperature (Section 3.4.4)
12/battery
voltage too
low
Device ready for
operation, “System
ready” LED goes off
1. Contact service partner (Section 12)
14/supply
pressure too
low
Device is not ready
for operation
Negative pressure not set
correctly
1. Adjust negative pressure (Section 6.5.3)
2. Replace filter for filter control valve
(Section 9.1.3)
3. Replace measuring head (Section 9.3.1)
15/optical
sensor very
dirty –
cleaning
required
Device is not ready
for operation
Light path components are
dirty
1. Clean the light path (Section 9.1.2)
2. Replace measuring head (Section 9.3.1)
Optional: Contact service partner
(Section 12)
Device is not ready
for operation
Measuring head defective
1. Replace measuring head (Section 9.3.1)
Optional: Contact service partner
(Section 12)
Device is not ready
for operation
Measuring head defective
1. Replace measuring head (Section 9.3.1)
Optional: Contact service partner
(Section 12)
33/supply
pressure too
high
Device is not ready
for operation
Negative pressure not set
correctly
1. Adjust negative pressure (Section 6.5.3)
2. Replace filter for filter control valve
(Section 9.1.3)
2. Replace measuring head (Section 9.3.1)
Device is not ready
for operation
Measuring head defective
1. Replace measuring head (Section 9.3.1)
Optional: Contact service partner
(Section 12)
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