7
Trouble shooting
Introduction
Condition
Cause
Remedy
Overload device in starter / isolator panel
trips.
No electric power.
The overload device monitors the
electrical power supply input and phase
imbalance.
Check that the overload device is set to
the full load current of the exhauster unit.
Check the electrical power supply and 3-
phase supply (if applicable).
Exhauster unit filters are
blocked.
Check the exhauster unit filters for
blockage. Remove and replace the
filters.
The air inlet to flow
regulating valve
obstructed.
Check air inlet to flow regulating valve
silencers for obstructions.
Exhauster unit bearing
failure or impeller
seizure.
Remove the motor end cap and check
for freedom of rotation.
Replace exhauster unit as necessary.
Exhauster unit produces abnormal noise
level.
Impeller seizure, bearing
failure or motor fan cowl
rub.
Remove exhauster unit motor end cap
and check motor for freedom of rotation.
Replace exhauster unit as necessary.
Leaking/blowing pipe
connections.
Carry out leak checks and tighten pipe
connections.
System flow rate too low and cannot be
reset.
Exhauster unit filters
blocked.
Remove and inspect the exhauster unit
filters for obstruction.
Flow regulating valve not
seating.
Inspect flow regulating valve for correct
operations. Clean valve seat.
Replace flow regulating valve as
necessary.
Exhaust pipeline
blocked.
Check the exhaust pipeline for
obstruction.
Exhauster unit gets overheated.
Inadequate ventilation
around exhauster unit.
Clean the exhauster unit casing and
surrounding area.
Cooling air inlet and
outlet ports are
obstructed.
Check the cooling air inlet and outlet
ports for obstruction.
Accumulation of dust on
exhauster unit cooling
fins.
Improve ventilation to exhauster unit.
Exhauster unit operating
on a closed or partially
closed system.
Check air inlets, exhaust pipeline and
flow regulating valves for obstructions.
Carry out a full system performance
check.
Duplex installation - stand-by unit
operates early or late.
Incorrect system failure
pressure switch setting.
Check the pressure switch for correct
settings.
Duplex installation - stand-by unit fails to
operate.
Unserviceable pump
failure pressure switch.
Change the pump failure pressure
switch.
Instruction book
36
Summary of Contents for AGS 1560
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Page 11: ...Simplified schematic of a AGS Simplex installation Instruction book 9...
Page 13: ...AGS Simplex AGS Duplex Instruction book 11...
Page 16: ...Service diagram AGS Simplex 1 ph typical Instruction book 14...
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