Service manual

Always On UPS Systems Inc
36
16. BOARD LED INDICATION TABLE
NORMAL ABNORMAL
PCB FUNCTION LOCATION
PCB LED
LED
Illuminated
Description
LED
Illuminated
Description
SOLUTION
Check 3T (R phase) ensure
cable connections are secure
and correctly attached.
LED A1
INV R
No
3T (R phase
working)
Yes
R phase failure and
UPS shutdown
Replace the board
Check 3T (S phase) ensuring
cable connections are secure
and correctly attached.
LED A2
INV S
No
3S (S phase
working)
Yes
S phase failure and
UPS shutdown
Replace the board
Check 3T (T phase) ensuring
cable connections are secure
and correctly attached.
LED A3
INV T
No
3T (T phase
working)
Yes
T phase failure and
UPS shutdown
Replace the board
Check 3G and ensure cable
connections are secure and
correctly attached.
LED A4
Overtemp Fault
(OTF)
No 3G working Yes 3G has problem
Replace the board
Check 3B and ensure cable
connections are secure and
correctly attached.
3A Main Control
PCB
Module
LED A5, A6
12VDCA
All Yes PCB has power No
PCB has no input
power
Replace the board
Check fuse set behind PCB
holder and ensure cable
connections are secure and
correctly attached.
LED B1, B2, B3,
B4
(B1 and B3
16VDCA)
(B2 and B4
16VDCB)
All Yes PCB has power No
LED's of PCB
extinguished
Replace the board
LED B6
Batt Test
Yes
The system is
testing the
batteries
3B Power Supply
PCB
Module
LED B7
Boost Charge
Yes
The system is
boost charging
the batteries.
Ensure cable connections are
secure and correctly attached.
Check the input power
LED C1
Rectifier Enable
Yes Rectifier Enabled No
PCB has no input
power or input power
outside of operating
parameters
Replace the board
Ensure cable connections are
secure and correctly attached.
3C
Rectifier Control
(It is separated
into 3CC and
3CD board for
the option of 12
pulse)
PCB
Module
LED C2, C3
12VDC
All Yes PCB has power All No
PCB has no input
power
Replace the board
Ensure cable connections are
secure and correctly attached.
3T
Inverter Phase
Control
PCB
Module
LED T1, T2
12VDCA
All Yes PCB has power All No
R, S or T phase lost,
output LED on the
front panel (mimic
diagram) blinks
indicating lost phase.
Replace the board
Ensure cable connections are
secure and correctly attached.
3R
Communication
Interface
PCB
Module
LED R1
5VDCB
Yes PCB has power No
Interface
communication failure
Replace the board
Ensure cable connections are
secure and correctly attached.
3G
Inverter Driver
(RST)
Inverter
Module
LED G1
Fuse Open Over
Temp
Yes Inverter working No Inverter failure
Replace the board
LED P1
(RED)
Inverter S.S.
Yes
Inverter output is
within normal
parameters
No
Inverter operating,
transfer from inverter
has failed
Replace the board
3P
Static Switch
Driver (R,S,T)
Static
Switch
Module
LED P2
(GRN) Reserve
S.S.
Yes
Reserve output is
within normal
parameters
No
Inverter operating,
transfer from reserve
has failed
Replace the board