Service And Troubleshooting - EnerSys NexSys+ TC3 IQ Owner's Manual

SERVICE & TROUBLESHOOTING

Service and Troubleshooting

Fault Display
In case of a fault, one of the corresponding fault codes
listed below will appear on the display. If it is a critical
fault, charging will stop and the red Fault LED will be
illuminated.
Fault Codes
Fault
Current fault before DF1 (can be low mains, phase
DF-CUR
missing or faulty module).
Critical current fault, all modules are on DF1 fault
DF1
(check the mains and phase missing).
DF2 Output fuse fault, battery reverse polarity.
DF3 Incorrect battery voltage for charger setting.
DF4
Battery or charger setting inspection (Ah security,
DF5
charge timeout, negative voltage Dv/Dt).
Air pressure pump fault. Current Di-Dt,
DF7
Charger thermal fault, all modules are on thermal
TH
fault (check air flow and ambient temperature).
TH-Amb Ambient temperature too high.
Module faulty (refer to Module Menu to know the
DFMOD
Module is unplugged or does not answer.
MOD DEF
Module converter faulty; the module can't output
MOD DFC the maximum current (check the AC phases and
16 16
Cause
Overdischarge.
thermal runaway.
fault type).
AC fuse).
Solution
Call for service.
Call for service.
Check the correct connection of the battery (reversed polarity
cables) and the output fuse.
Battery voltage too high or too low. Battery voltage must be
between 1.6V and 2.4V per cell for lead-acid technology. Use
proper charger for battery.
Charge continues.
DF5 appears when the charging profile has been achieved
with a fault condition. That can be an increase in current
during the regulation phase indicating battery heating or a
badly programmed regulation voltage, or the charging time
is too long and has exceeded the safety limit. Check charging
parameters: profile, temperature, capacity, cables. Check the
battery: defective cells, high temperature, water level.
Call for service.
Verify the proper operation of the fans and/or absence of too
high ambient temperature, or there is poor natural ventilation
to the charger.
Move the charger to a place with lower ambient temperature.
Follow instructions on installation and safety.
Call for service.
Clean the module or the backplane connection. If not working,
call for service.
Check power supply.