Installation Guide

3
Compressor Defender™ Maintenance:
¡AC Voltage SPD:
Periodically check Compressor Defender™ to ensure green indicator LED is ON. If green LED
is OFF, protection has diminished and the Compressor Defender™ should be replaced immediately.
Table 1. LED Indicators (Diagnostics)
Condition Green LED Red LED
Surge Protected ON
No Surge Protection OFF
Under Voltage Flash
Short Cycle Protect Flash
Unit Power Lost OFF OFF
Figure 4. 24 VAC Contractor Wiring.
Compressor Contactor
24 VAC
C
Y1
Contactor Wiring
From Compressor
Defender
BLACK
RED
Table 2. Operation
See operation table below for an overview of the Compressor Defender™ Operation
Condition Description
Under Voltage If line voltage falls below the accepted level, the relay output will open
until the line voltage returns to the accepted level. Voltage Drop Protection
conditions comply with AHRI standard 110-2012 Range B. For Voltage
conditions that drop below outside the limits of Range B prompt corrective
action is recommended
120 VAC Nominal – Range B 104 VAC
208 VAC Nominal – Range B 180 VAC
240 VAC Nominal – Range B 208 VAC
Short Cycle Delay Once the line voltage exceeds the pick-up line voltage, the relay will close
after the time delay elapses. Delay = 3 Minutes (non-adjustable).
Normally Closed Operation If surge or voltage monitoring protection is lost, the unit will continue nor-
mal compressor and thermostat operation without surge protection. The
unit should be replaced to restore surge protection to the circuit.