Xtreme Power Conversion P91 - Page 20

Xtreme Power Conversion Corporaon
P91, TX91, TX91L, TXVR Service Manual
Page 20
Uninterrupble Power Supply
Code LCD icon Fault Event Descripon Acon
14 Output short
circuited
When INV output voltage remains
lower than 50V and output current
keeps lower than 20A for over 3 peri-
ods, the fault signal will be displayed.
Remove all the loads. Turn o the
UPS. Check whether the output of
UPS and loads are short circuited.
Make sure the short circuit is
removed, and the UPS has no
internal faults before turning on
again.
1A None Negave power fault When the output power on the INV
terminal is over -800W, the fault
signal will be displayed.
Check if input and output con-
necons are correct. And then
check if INV relay RY5 or STS(Q13,
Q14, Q20,Q25 and their driver
circuits) are OK.
60
None Inverter over current Inverter voltage > 100V, and (Inverter
voltage - bypass or line voltage) < 20V,
and detected inverter current > 75A
(10K) or 45A (6K)
Check if the heavy load or unique
load is connected to the UPS.
6D
None Inverter current
detecon error
The sample average value of Inverter
current/ output current/share current
is too high.
Check if the INV and output cur-
rent detecng circuit is OK.
77
None Transformer over
temperature
Transformer is over temperature limit
for 1 minute
Just for cTUVus model
Check if the Transformer Fan is
damaged or the transformer NTC
wire is shorted. If not,
connuous 1minute. Maybe you
need to replace the dry board and
the communicaon board. AT
worst, the transformer is dam-
aged.
21
None Baery SCR short
circuited
When baery voltage is more than
310V, the fault signal will be dis-
played.
main board is probably damaged.
Replace the board.
24
None INV relay short cir-
cuited
Aer Bus so start completes and INV
PWM is o, more than 50V INV volt-
age is detected, the fault signal will be
displayed.
INV relay on the main board is
shorted. Replace the main board
2A
None Charger short cir-
cuited
Detecng baery voltage less than
100V
If the charge 2P wire and ba ery
voltage are ok, charger circuit may
be faulty. Replace the PSDR board