Download - DG Trouble shooting
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POWER TROUBLE SHOOTING
GENERAL FAULT DETECTION & ACTION
Vodafone Rajan Kumar
Vodafone Rajan Kumar
Sl no Problem Symptom Remediescheck battery voltage,it must be above 12 v.
check battery voltage,it must be above 12 v.check fuel level it must not be in reserve ie above
30 lt.check air at fuel pump,there must be continuous
flow of fuel.Check emergency stop button and stop solenoid wheather they are in normal ie in open condition
Informed to Infra Electrical teamDG giving low output
voltageCheck DG RPM. It must be 1500rpm
Check AVR working condition
Check DC voltage given to alternator for excitation
Informed to Infra Electrical teamCheck fuel level
Check lube oil availabilityCheck cooling system ie water or air cooling
Informed to Infra Electrical teamCheck air filter status wheather it is chocked
Check lube oil availability ,it must be sufficint as per dip gauge meter.
Informed to Infra Electrical teamRemark:Plz be sure that befor starting the DG,DG body & neutral must be grounded
3DG running but not giving
proper supply DG giving no or 40/50 v ouput
4 Dg not running properly
Dg getting stopped after some time or speed
hunting
Dg giving white smoke/black smoke
DG Troubleshooting
1 Dg fails to start Dg not at all startingcheck battery connections to DG body and self.
2Dg taking start but not
runningDG taking starting crank
but not running
Vodafone Rajan Kumar
Sl no Problem Symptoms Remediescheck DG to PIU connectionMust be DG in on condition
PIU Ac Input MCB must be in on condition
PIU 12 v battery must be charged for display
Powe Switch at CPU of piu Must be in on Condition
If PIU battery is discharged, contactor can be made on hold manually to obtain
power output.
3No out put from Out
put MCB Out put not obtained MCB must be in ON position(Upword)
Remark:Plz be sure that befor switch on the PIU/PMU,PIU/PMU body must be grounded
PIU/PMU Troubleshooting
1Output is not
obtainedAC power is not
obtained at piu input
2Ac power is not obtained at load
distribution panel
Dg contactor not holding
Vodafone Rajan Kumar
Sl no Problem Symptom Remedies
Check power connection from PIU to SMPS
There must be AC supply at MCB output at SMPS end
Make sure Ac power MCB at PIU and SMPS must be in ON condition
Rectifier MCB must be in on condition
VMR setting statusCheck VMR under and over voltage
setting, it must be in beetween 210v-240v
AC contactor must be in free moving condition
There must be AC supply(A1,A2 Port) to make contactor to hold.
Informed to Infra Electrical teamsite not running on
batteryChect SMPS to BATTERY BANK connection
Fuses are faultyHRC fuse must be in normal working
conditionCheck LVD DC connector, at both LVD
there must be a supply of 12 v dc.,IF not obtained LVD can be made to hold bu
making Rectifier on and then running on rectifier for some time.
Informed to Infra Electrical teamshort backup due to battery not getting
charged
Check charging current limit. It must be 10% of rated Battery Bank.(for 600AH it
must be 60 Amp)Check tightening of all shorting strips. It
must be 10nmcheck wheather any cell of battery banf is damaged(Each cell voltage must be above
1.7v)Battery (+)ve terminal must be connected
to (-)ve busbar of SMPS and must be grounded properly
Battery(-)ve terminal must be connected directly to hrc fuses input of SMPSInformed to Infra Electrical team
SMPS/BB Troubleshooting
1Rectifier Module
not working
No Output even when AC power is turned on
AC Contactor status
2DC supply is not
obtained
LVD not holding
3
Battery bank is not giving proper output/not
chargingshort backup due to
improper installation
Remark:Plz be sure that befor switch on the SMPS,SMPS body &+ve bus-bar must be grounded
Vodafone Rajan Kumar
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Vodafone Rajan Kumar
Vodafone Rajan Kumar
Vodafone Rajan Kumar
Vodafone Rajan Kumar
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