Troubleshooting guide

25
Multiquip Inc. ◦ DCA Generators Troubleshooting Guide ◦ Manual No. DCATRBLSHOOT
A
A
U
U
T
T
O
O
M
M
A
A
T
T
I
I
C
C
V
V
O
O
L
L
T
T
A
A
G
G
E
E
R
R
E
E
G
G
U
U
L
L
A
A
T
T
O
O
R
R
This potentiometer (pot) is the
voltage course adjustment pot.
Two WHITE wires from the V-Leg
Relay are connected here.
There are four connectors that attach to the AVR and two wires to the AVR terminals. The AVR also has three
potentiometers, only one is for course adjustment the other two should NOT be touched.
IMORTANT: There is no procedure for directly testing the AVR, use process of elimination.
Open delta leads and excitation leads connect to
the AVR on this connector.
DCA 25 ONLY
A ~ Wire is – YELLOW
B ~ Wire is – ORANGE
C ~ Wire is – WHITE
D ~ Wire is – GRAY
J ~ Wire is – RED
K ~ Wire is – BLUE
This connector has no outside connection and has a
couple of bridge jumper wires.
P1, P2 ~ Wire is WHITE and are bridged together.
ℓ, K ~ Wire is WHITE and are bridged together.
Wires connected here are for AVR internal sensing.
U ~ Wire is RED and is connected to terminal # 14 on the voltage selector switch.
V ~ Wire is WHITE and is connected to V-Leg Relay (RY1)
W ~ Wire is BLUE and is connected to terminal # 36 on the voltage selector switch.
This connects the Rheostat (VR) to the AVR.
1 ~ Wire is GRAY
3 ~ Wire is YELLOW
DCA 45
to DCA
150
A ~ Wire is labeled ~ A
B ~ Wire is labeled ~ B
C ~ Wire is labeled ~ C
D ~ Wire is labeled ~ D
J ~ Wire is labeled ~ J
K ~ Wire is labeled ~ K
DO NOT
!
adjust the other two pots, these are factory pre-set.
VISUAL REMINDER
: The pots
are positioned similar to a
backwards capital letter ‘L’
(wires colors are black)
8 amp fuse MQ part # 6978K753