113904 – S
yst
em
Us
ers M
anual
15
TROUBLE SHOOTING CHA
R
T
B a t t e r y
Voltage
l o w
o r n o n
existent
1
2
3
4
5
Battery
voltage
does
not read
properly
after
Installation
of
fresh
cells
4
3
1
2
Battery
acid
leaking
in
cabinet
or
around
tops of
batteries
1
2
4
3
Batteries
require
continuous
addition
of water to
keep proper
level
(optional w/
wet cells)
3
1
2
4
Charger
stays in
HI
charge
1
2
3
Charger
not
charging
properly,
batteries
low or
dead
2
6
3
4
5
1
System
blows
battery fuse
(& fuses in
battery
cabinet if
applicable)
3
5
6
2
1
4
Inverter
jitters or
staggers
during a
power
failure
1
3
2
System
noisy,
transformer
hum
during a
power
failure
1
2
3
System
overheats,
smells,
smokes,
etc.
3
2
1
4
6
5
AC output
voltage
low
during a
utility
power
failure
3
2
1
4
System
noisy,
excessive
transformer
hum during
normal run
conditions
1
2
3
System
draws
excessive
AC input
current
1
2
3
Inverter
will not
run
during a
power
failure
1
3
4
6
2
11
7
10
9
8
5
S
Y
M
P
T
O
M
S
THE NUMB ER IN TH E
CHART IND ICATE S
ORDER IN W HICH
PROBLEM S S HOULD
BE CH ECK ED
P R O B L E M S
Installation switch on
inverter in off position
S h o r t e d I G B T
m o d u l e ( s )
No AC input voltage
D e f e c t i v e i n v e r t e r
Output volt-ampere
rating of unit being
exceeded
Ambient temperature too
high, vents blocked
S h o r t e d l o a d
R e v e r s e b a t t e r y
d i o d e s s h o r t e d
Open battery fuse (&
fuses in battery cabinet
if applicable)
Battery polarity w r o n g
D e f e c t i v e c h a r g e r
B a t t e r y c a p a c i t y l o w
L o w w a t e r i n b a t t e r y
(optional w/ wet cells)
Wrong amount of battery
cells in series
Batteries dead, low or
defective
Transfer module and/or
control circuit
malfunction
Transformer not
connected for proper
voltage