Installation manual

54
G. Both drive motor and blower (impellor/fan) motor (for Reversing Models ONLY) are not
operating (do not start) and indicator light is on...
1. Fault at L1 or L2 termination(s) between the terminal block and contactors (relays).
2. Failed contactors (both blower [impellor/fan] and drive ).
3. Failed motors (both blower [fan/impellor] motor and drive motor).
H. Heating unit is not operating (no heat)...no voltage at the heating unit (i.e., DSI [Direct Spark
Ignition] module)...
1. Fault in sail switch circuit ...
a. Sail switch is out of adjustment or has failed.
b. Sail switch damper is not closing or is fluttering ...
1) Lint screen is dirty.
2) Restriction in the exhaust.
3) No exhaust air flow ...
a) Failed impellor (fan/blower).
b) Fault in blower (impellor/fan) motor circuit (for Reversing Models ONLY).
2. Tripped burner manual reset hi-limit.
3. Tripped lint chamber sensor bracket basket (tumbler) manual reset hi-limit switch.
I. No heat...voltage is evident at heating unit (i.e., DSI [Direct Spark Ignition] module)...
1. Fault in Direct Spark Ignition (DSI) system ...
a. Spark probe sparks, but no ignition and DSI (Direct Spark Ignition) module "LOCKS-OUT" ("red"
L.E.D. indicator flashes) ...
1) Flame probe assembly is out of adjustment or has failed.
2) Severe air turbulence.
3) Failed DSI module.
4) Failed gas valve.
b. Spark probe sparks, but burner goes off right away ...
1) Flame probe assembly is out of adjustment or has failed.