Specifications

32
© 2012 Emerson Climate Technologies, Inc.
Printed in the U.S.A.
AE8-1368 R2
Fail-Safe Inoperable
6.12
The fail-safe feature exists for conditions involving the loss
of communication to the controller (wire failure, controller
failure, etc.). In the event of an electronics failure of the
control module, the use of an emergency jumper may be
used to force the compressor “on” while still utilizing the
high and low pressure switches on the compressor.
When using this jumper, note that the following protection
features are bypassed at your own risk:
4D / 6D motor protection is disabled
Oil pressure protection
Discharge temperature protection
All protection features provided by the sensor module
Unloader operation
2D and 3D line-break protection is still operable with this
by-pass arrangement
Connect the jumper between the contactor
connection that goes to the black contactor
output wire
Connect the other end of the jumper to one
of the low pressure switch tabs. If the
compressor fails to run, reconnect the low
pressure switch wire and then connect the
jumper to the other tab
-Emergency By Pass Jumper
Unloader 1 input Yellow
Demand input Orange
Wiring Side
Views
Unloader
#1
Yellow Yellow
Violet
24V Power Black
24V Power White
Unloader 2 input Violet
LPCO
RED RED
Contactor
Output
White
Black
Oil
Pressure
S S S C
Or
Or
Or
Black
Blue 2D / 3D only
Blue
Blue
Disch
Temp
Probe
6 5 4 3 2 1
Motor Sensors Not
on 2D / 3D
Class II 24
VAC Power Supply
Blue 2D / 3D only
Blue 2D / 3D only
Blue 2D / 3D only
Terminal Box
Contactor
Blue
Jumper
HPCO
Violet
Unloader
#2 (not on
2D/ 3D)
White
7 8 16 15 4 5 13 6 14 3 12 2 11 1 10
Contactor Output