Instructions / Assembly

Section 1... the “POWER” LED

“System Sentinel” Troubleshooting Guide

Is the “POWER” LED Illuminated?

Is the “ON/OFF” Switch in

the “ON” position?

Turn switch to ON position. Is the

Power LED now illuminated?

Po w e r i s

being supplied to the heater,

the ON/OFF Switch is func-

tioning, and the 24V AC

Transformer is functioning.

Is 120 VAC power present at the

branch circuit connections to Black

wire of the switch and White wire of

the transformer ?

YES

Check circuit breaker or fuse and field connec-

tion of branch circuit wiring to leads of switch.

Repair or replace as required. Is “POWER” LED

now illuminated?

Is 120 VAC power present between

the Black and White wires to the

transformer ?

Is 24 VAC power present between

the Yellow and Gray wires from the

transformer ?

The System Sentinel Panel is defective

and must be replaced.

Replace Switch, then verify that

power is present. Is “POWER” LED

now illuminated?

YES

CAUTION

Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. VERIFY PROP-

ER OPERATION AFTER SERVICING!

Replace Transformer, then verify

that power is present. Is “POWER”

LED now illuminated?