Jumper Blue and
Blue/White peak control
wires inside the heater’s
electrical compartment.
Does the off-peak light
illuminate?
Check unit wiring.
Check wiring to peak
control device.
Replace the circuit
board (29).
Fix unit
wiring.
Incorrect
Yes
Fix or replace peak control
device (time clock, etc.).
Fix field
wiring.
Incorrect
Correct
No
Correct
MODEL: EXT
FUNCTION: Peak Control
PROBLEM: Green Off-Peak light does not come on at the appropriate times
Before starting any procedures listed below, there must be appropriate line
voltage present between F1/F3 and L1/L2 terminal block positions in the heater.
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