Asco 1251794, Руководство пользователя

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IHT Technical Reference
Fan Tripped On LoadBank nn Fan Overload signal not present
when fan run output energised. • Fan Circuit Breaker or Overload
Tripped. Check fan is not obstructed and
that it is free to rotate. Then reset Trip or
Circuit Breaker.
• Check motor current.
Fan Not Running On LoadBank nn Fan Contactor auxiliary contact
signal not present, when fan run
output energised. • Fan contactor not energising or faulty
auxiliary contact.
Fan Power Fault On LoadBank nn Fan/Control Circuit Power
supply is outside limits on
voltage and/or frequency or a
phase is missing. • Check control voltage, frequency and
phases. If the generator rating is incorrect
run the load bank from an auxiliary supply.
• Check the Fans and Controls Supply
Selector switch is in the correct position.
• Load bank fan supply VT fuses blown or
VT’s faulty. Check fuses and VT output.
Over Temperature On LoadBank nn Over Temperature signal not
present. • Load bank is over temperature. Ensure
that the load bank ambient temperature is
not exceeded and check hot air discharge
is not recirculating. Allow the load bank to
cool, and then press Stop and Start
buttons.
• Over temperature trip faulty. More than
one over temperature trip may be fitted.
These devices will automatically reset
when they cool down.
Air Flow Failure On LoadBank nn Air Flow signal not present after
fan output energised. • Fan or Duct obstructed. Flow detector
faulty. Check flow detector operation.
Supply Over Limits On LoadBank nn Load Supply frequency is too
low for voltage applied. • The supply is outside the
voltage/frequency limit. To maintain the
same voltage increase the frequency of the
supply on test or, alternatively, to maintain
the same frequency reduce the voltage.
Duct/Louvres Closed On LoadBank nn Duct Covers or Louvres
proximity detector (if fitted)
signal not present. • Duct covers or louvres closed. Open
duct covers or louvre.
• Proximity detector faulty - Check
detector operation.
Lost Communications On LoadBank nn Load bank and/or IHT have
lost communications. • IHT disconnected from load bank whilst
load applied. Press Stop, and then Start on
the load bank.
• IHT or load bank interconnecting cable
fault. Check and replace.
Error Message Description Possible Causes