29
Dalamatic Insertable Dust Collectors – Series DLM V
Installation, Operation and Maintenance Manual
Symptom
TABLE 2 – FAULT LOCATION
Possible cause
Action
1 Part loss of suction
(excessive pressure
differential).
3 Visible effluent in
clean air outlet.
2 Total loss of suction.
1.1 Compressed air
mal function.
1.2 No pulses of air to
valves.
1.3 Filter elements blocked.
1.4 Motor speed low.
1.5 Incorrect fan motor
rotation.
a If compressor stopped, rectify compressor fault;
check interlocks; check motor and supply; check
drive.
b If compressor OK, check pulses at manifold
pressure gauge.
c Clean filters, dismantle and clean moisture
separator.
d Check for excessive water or oil in compressed
air supply, and possible accumulation in
manifold.
a Refer to 'Fault location' table in controller manual
supplied with dust collector.
a Check that emptying device or equipment being
served is working. Check starter overloads,
fuses and interlocks.
b Run filter elements clear*, then remove each
element in turn and vacuum-clean all its outer
surfaces. Renew any filter bags that are
damaged.
a Check line voltage, phases, fan motor
connections. For Star/Delta applications, check
motor is in Delta.
a Check electrical connections and transpose if
necessary.
a Check motor supply overloads, fuses and
interlocks (if fitted).
b Check motor connections and windings.
a Check that emptying device or discharge
equipment is working. Check starter overloads,
fuses and interlocks.
b Run filter elements clear*, then remove each
element in turn and vacuum-clean all its outer
surfaces. Renew any filter bags that are
damaged.
a Check throughout and clear.
a Tighten element retaining bolts to ensure
compression of sealing rings.
a Damaged filter bag can be identified by the dust
present in clean air chamber. Withdraw element
and renew bag.
2.1 Fan motor stopped.
2.2 Filter elements blocked.
2.3 Ducting blocked.
3.1 Filter elements not
properly sealed.
3.2 Damaged filter bag.
MAINTENANCE
*To run filter elements clear, switch off main fan only and allow the controller to perform
several complete cleaning cycles before switching off compressor etc.
This procedure is not recommended where explosion panels are fitted, as damage
could result to the Membrex membrane. In such cases consult with Donaldson.
