GE Industrial Solutions On-line VH Series UPS - Manual (Page 24)

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GE_UPS_OPM_VHU_0K7_2K0_XUL_V040.docx Operating Manual VH Series 700 - 1000 -1500 – 2000 VA UL
7 TROUBLESHOOTING
Whenever a malfunction occurs, first check external factors (e.g. connections, temperature, humidity or load) to determine
whether the problem is caused by the unit itself or by its environment. Subsequently check the thermal circuit breaker: it
may be tripped. If so: reset it (see fig. 3.4a/b) and be sure that the UPS is not overloaded.
The following chart is a simple troubleshooting checklist only. If the suggested solution does not succeed, or if the
information is insufficient to solve the problem, please contact your dealer or consult www.gedigitalenergy.com.
PROBLEM POSSIBLE CAUSE SOLUTION
Thermal Circuit Breaker (TCB) tripped
UPS overload Reduce load, reset TCB (2, fig. 3.4a/b)
System failure
Contact your dealer or consult
www.gedigitalenergy.com
UPS will not switch on (without using
'battery start') and the output has
been off for a few secs. (see also
4.3.4)
Line cord not connected
Read 3.5.2 Connect line cord
Dead wall socket outlet, or mains
voltage out of limits
Contact qualified electrician
Tripped Thermal Circuit Breaker See above
LEDs ‘operation’ and ‘alarm’ blink,
buzzer sounds 1/2 secs. UPS does
not start. P (phase) and N (neutral) are
reversed at the UPS input in a
system with grounded Neutral.
In a system with grounded Neutral:
reverse the mains plug.
In other systems: disable the
indication. See 4.4.12 and 4.5.
In case of doubt contact a qualified
electrician.
UPS switched off automatically
UPS overtemperature Allow UPS to cool down
Mains failure, battery discharged Wait until mains returns
Programmed shutdown in progress See 4.4.10
The load is < 5% of the max. load
and no mains power is present.
(No-load shutdown function is active,
see 4.3.2)
Wait until mains returns
LEDs ‘alarm’ and ‘on battery’ blink,
buzzer sounds 1/5 secs
Battery test just after installation or
mains failure Allow the UPS to recharge the
batteries
Battery test shows weak battery Have the batteries replaced