Product Service 1-800-522-7658
169
PROBLEM
CAUSE
CORRECTIVE ACTION
Blower runs
slower than
normal; speed
control has little
effect on blower
speed. Blower may
take more than 5
seconds to start.
Motor signal wires
damaged or
disconnected
Measure motor output signal
voltage. Inspect signal wiring and
connections
Power Supply
Board
misconnected or
defective
Test output voltages on the Power
Supply board.
Motor jumper wire
is damaged/
disconnected
(115/100 Volt
models only)
Inspect grey wire #31 on 15 pin
connector for continuity.
Blower motor is
defective
Replace blower motor.
Keypad
disconnected or
defective
Run keypad diagnostics and check
connections.
Fluorescent light
not working
Sash is closed
Open sash – Fluorescent lights will
not work with the sash closed.
Lamp(s) are
defective
Replace defective lamp(s)
Lamp wiring is
disconnected
Inspect lamp wiring.
Defective lamp
ballasts
Replace lamp ballasts.
Keypad
disconnected or
defective
Run keypad diagnostics and check
connections.