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September 1, 1997
X1
X1A
O
P
T2
Y
R
T1
R
T3
T7
T4
K1 Alm
T5
R
Jumper
to all
T6
Boards
Y
Jumper
to all
Boards
R
Y
Jumper
Y1
Y2
Y2
to all
Non Sat
Boards
P
O
EPC Alarm
Relay
Contacts
Compressor Alarm Circuits
If the Compressor Motor Contactor fails to com-
plete the motor circuit, its Normally Closed
Auxiliary contacts energize the K1 Alarm Relay.
Once energized the K1 Relay maintains its own
circuit through the Normally Open K1 Contacts.
The Compressor Board Switch must be opened to
de-energize the K1 Relay.
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EPC
Compressor
Controller
Contacts
K1
S1
K2
K1
T10
T9
R
Y
P
T
X23
C# Protector
X2
Comp
Alarm Board
Figure 4-8 — K1 & Compressor Alarm Circuits
HUSSM ANN CORPORATION • BRIDGETON, M O 63044-2483 • Printed in USA
K1 Relay Coil - Circuit Tracer
Compressor Alarm Relay Coil - Circuit Tracer
Power LED
Fuse LED
Circuit
R
F1
O
Y
BL
BR
B
C# Aux Cont
BR
B
BL
NO
4
BL
1
O
2
HP
Oil Failure
The three Normally Closed K1 Contacts are held
open during alarm conditions. The K1 Contacts
between T5 and T6 open the circuit to the
Compressor Alarm on the rack's Alarm Board.
P/N 401789
T8
K2
G
K1
R
Alarm LED
R
Oil LED
H Press LED
Circuit
R
K1
Y
Run LED
O
R
W
W
R
C#
Motor Cont Coil
120
O
GY
GY
TD
4 - 13
X2
W
W
Jumper
from all
Boards
W
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