Dantherm NF-8HD Руководство - Страница 16
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01AUG 1005GB
Error diagnostics
Error
LED 1.1 Fig. 1 is not illuminated
and E1 and E2 are bridged.
No valve activation
No down-time-cleaning
The cleaning is inefficient
Faulty display of the pressure differ-
ence
NF-8E / NF-16E alarm
Possible cause
•
Power failure
•
Fuse in controller defect
•
The plant's emergency stop is
activated
•
Internal control error
•
Defect lead connection
•
Defect magnet coil
•
Cycle interrupt
•
DTC cycle = 0
•
No signal from fan
(DTC mode 1-2)
•
Pause period too long
•
Cleaning pressure too low
•
Valve defect
•
Pulse duration too short
•
Cleaning cycle often disrupted
•
Defect filter system
•
Large-scale filters (>160 valves)
where only a part of the filter is
cleaned
•
Failure in the hose connections
•
Valve setting wrong
•
NF-8E / NF-16E controller de-
fect
Cat.20 / Tab. 05.91 / Page 07.03
Recommended action
•
Check the circuit voltage
•
Check the fuses.
•
Replace the fuse.
•
Check the emergency stop.
•
Contact Dantherm Filtration
service
•
Check cables and cable connec-
tions
•
Replace magnet coil.
•
Detach pressure difference me-
ter, change the settings and
check the hose connections, etc.
•
Set other value
•
Apply signal to terminals E1
and E2.
•
Reduce pause interval 04
•
Adjust the pressure to 6-8 bar
(min. 5 bar).
•
Pause too short, so pressure is
not reached.
•
Check/replace valve.
•
Can be modified in setting mode
after consultation with Dan-
therm Filtration.
•
Check pressure difference meter
and hose connection.
•
Check the filter's operation in-
structions.
•
Set the two main controllers to
the same setting values.
∆p
•
Check if
-MAX and
MIN switching points are set
correctly.
•
Empty the hoses.
•
Clean the hose connection on
the filter housing with com-
pressed air (blow direction fil-
ter, never in sensor direction).
•
Remove any bending on the
hoses.
•
Check the hoses inside the con-
trol unit for water, or the like.
•
Check the number of valves
•
Replace the defect controller
∆p
-