Troubleshooting - GE VH UL series User Manual

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. 3.4.a/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.gecriticalpower.com.
PROBLEM
Thermal Circuit Breaker (TCB) tripped
UPS will not switch on (without using
'battery start') and the output has
been off for a few secs. (see also
4.3.4)
LEDs 'operation' and 'alarm' blink,
buzzer sounds 1/2 secs. UPS does
not start.
UPS switched off automatically
LEDs 'alarm' and 'on battery' blink,
buzzer sounds 1/5 secs
Modifications reserved
GE_UPS_OPM_VHU_0K7_3K0_XUS_V011.docx
Critical Power
POSSIBLE CAUSE
UPS overload
System failure
Line cord not connected
Dead wall socket outlet, or mains
voltage out of limits
Tripped Thermal Circuit Breaker
P (phase) and N (neutral) are
reversed at the UPS input in a
system with grounded Neutral.
UPS overtemperature
Mains failure, battery discharged
Programmed shutdown in progress
The load is < 5% of the max. load
and no mains power is present.
(No-load shutdown function is active,
see 4.3.2)
Battery test just after installation or
mains failure
Battery test shows weak battery
Operating Manual VH700 UL, VH1000 UL, VH1500 UL, VH2000 UL & VH3000 UL
SOLUTION
Reduce load, reset TCB (2, fig. 3.4.a/b)
Contact your dealer or consult
www.gecriticalpower.com
Read 3.6.2 Connect line cord
Contact qualified electrician
See above
In a system with grounded Neutral:
reverse the mains plug.
In other systems: disable
indication. See 4.4.13 and 4.5.
In case of doubt contact a qualified
electrician.
Allow UPS to cool down
Wait until mains returns
See 4.4.11
Wait until mains returns
Allow the UPS to recharge the
batteries
Have the batteries replaced
the
Page 24/25