41
Alarm
type
LCD display Possible cause Remedy
Fault 1A : NegPower UPS output power is negative. Contact the dealer.
There is energy feedback into the
UPS from the output. This may be
caused by regenerative load or cur-
rent control failure in the parallel
system.
Fault 21 : Batt SCR Short The internal battery SCR has failed Contact the dealer to repair.
short.
Fault 24 : Inv Rly Short The internal inverter relay is perma- Contact the dealer to repair.
nently shorted or the SCR of the
STS (Static Transfer Switch) is
shorted.
Fault 35 : Para Comm Fail Parallel cable for communication is Securely connect the parallel cable.
not securely connected in the
parallel system.
Fault 36 : OP.I Unbalance The output current is extremely Contact the dealer to repair.
unbalanced between the parallel
UPSs or there is an error in the
parallel system.
Fault 41 : Over Temp The internal temperature is too 1) Do not allow the ambient temp-
high and has reached the fault erature to exceed 40°C.
level (shutdown) : 2) confirm that the fan is not blocked
1) environment may be too hot. and is operating normally.
2) fan may be blocked or has 3) confirm that there is good ventila-
failed. tion.
3) ventilation may be blocked by 4) remove the overload.
the wall or other objects.
4) the UPS is overloaded.
Fault 42 : CPU Comm Fail Internal communication failure Contact the dealer to repair.
between CPUs.
Fault 43 : Over load Duration of overload is outside the Remove excess loads from the UPS
specification and the UPS shuts output and restart the UPS.
down automatically.
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