TROUBLESHOOTING
NP-DK50-Nx2VTM-ADM-EN-1_06-2022
54
06/2022
Leak through solenoid valves once
regeneration is complete
Clean the check valve - replace if
damaged
Leak at pressure sensor and safety
valve
Test their function and clean, or replace
if damaged
Output of certain air
pumps is reduced,
extended run cycle
Output of certain air
pumps is reduced,
extended run cycle
Air pump leaking
Check connections on the air pump for
leaks
– tighten leaking connections
Worn piston rings
Replace worn piston
Gasket between cylinder head and
valve plate damaged
Replace gasket, tighten
Air pump leaking
Check connections on the air pump for
leaks
– tighten leaking connections
One of the air pumps
is noisy (knocking,
metal noises)
Damaged motor bearing
Replace damaged bearing
Damaged piston bearing, piston rod
Replace damaged piston
Failed (cracked) rubber mount spring
Replace damaged spring with new
spring
High
ambient
temperature causes
compressors
to
switch off in vertical
stacks (overheating)
Lack of ventilation in compressor room
Secure suitable ambient conditions
Cooling fans for aggregates, cooler and
enclosure do not work
Defective fans - replace
Defective temperature switch - replace
Degraded
drying
performance
– high-
pressure dew point
(condensed water in
the air)
Low operating pressure
Reduce the demand for air, check the
output from the compressed air source,
fix any leaks in the distribution system
Regeneration solenoid valve not
working
Check coil operation, replace if damaged
Air regeneration nozzle plugged
Clean or replace the nozzle
(see product maintenance)
Cooling fan not working
Check the power source to the fan
Replace damaged fan
Dirty cooler
Inspect the cooler and clean as
necessary
Silencer
plugged
at
outlet
from
regeneration valve
Inspect the silencers. Clean or replace
the silencer if flow resistance is too high
or if heavily soiled.
Dryer emitting high
levels of noise
Damaged fan
Replace damaged fan
Damaged silencer
Replace the silencer
Air leaking through relief valve at dryer
inlet
Check the dryer connection to the mains
and dryer connections, check dryer
operation, check the dryer’s working
pressure,
and
replace
defective
components.
Air leaking through
relief valve at dryer
inlet
Compressor running at high working
pressure
Check
the
compressor’s
working
pressure setting
Dryer inlet solenoid valve not working
Check coil operation, replace if damaged
Inspect the condition of the valve - clean
the valve or replace if problems persist
High pressure in equipment resulting
from plugged filters
Check the internal filters and accessory
filter assemblies.
Clean or replace dirty filters.
Once a fault is cleared and after reassembling
the dryer, the condensate must be drained
from the air tank, then dry the air tank, and the
dryer must be regenerated, best when using
continuous compressor operation at a
pressure of around 7.0 bar for a period of at
least 1 hour.
Summary of Contents for DK 50 4X2VT/M
Page 1: ...DK50 4x2VT M DK50 6x2VT M USER MANUAL EN...
Page 2: ......
Page 13: ...PRODUCT DESCRIPTION 06 2022 13 NP DK50 Nx2VTM ADM EN 1_06 2022 Fig 2 Adsorption dryer...
Page 24: ...INSTALLATION NP DK50 Nx2VTM ADM EN 1_06 2022 24 06 2022 Fig 5 Handling the compressor module...
Page 31: ...INSTALLATION 06 2022 31 NP DK50 Nx2VTM ADM EN 1_06 2022 15 PNEUMATC DIAGRAMS DK50 4x2VT M...
Page 32: ...INSTALLATION NP DK50 Nx2VTM ADM EN 1_06 2022 32 06 2022 DK50 6x2VT M...
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Page 60: ...NP DK50 Nx2VTM ADM EN 1_06 2022 112000595 0001...