15
CONDITION “E” continued …
POSSIBLE CAUSE
VERIFICATION
SOLUTION
Wiring to GC-4A (115V)
Turn Rocker Switch OFF. With an
If no continuity on any wire, replace
ohmmeter, check continuity of red &
or repair as required.
black wires of the 3-conductor Molex
connector.
If all continuity checks ok, check if
motor wire terminals mate correctly
when joined.
Turn gas valve top knob to “ON” after
completing checkout.
CONDITION #1 - BOILER IGNITES (8 SECONDS) THEN SHUTS OFF
GC-4A Light is “ON”, Red Light “ON”, Green Light “ON” (during 8 second ignition trial). After 3 min. 45 sec (5
unsuccessful igntion trials) the GC- 4A light then blinks.
IF THE BOILER, WHEN IT RUNS, STOPS BEFORE THE GREEN LIGHT GOES OUT - PROCEED TO
“CONDITION #3.”
POSSIBLE CAUSE
VERIFICATION
SOLUTION
Copper Pressure Sensing
Turn Rocker Switch OFF & remove
Repair or replace as necessary.
Tube
top from Air Cushion Chamber
(A.C.C.). (On AM-100 & -150 remove
Runs from Gas Cushion
fan assembly). Check tube for breaks
Chamber (G.C.C.) valve
at the GCC valve plate & on the
plate to Combustion
AM-300 at the fitting on the ACC
Prove-Pressure Switch (PS1).
wall. Check unions are tightly
connected.
Pressure Switch (PS1)
If removed, replace fan assembly
If boiler runs more than 9 seconds
(Combustion Prove Switch)
and air cushion chamber top and
(with jumper in place), replace switch
turn Rocker Switch ON.
(PS1).
Immediately after boiler starts, place
If boiler runs 8 seconds (stops when
jumper across PS1 pressure
Green Light goes OFF) with the
switch terminals (R-W). DO NOT
jumper in place, proceed with
PUT JUMPER ON UNTIL GAS
verification.
VALVE IS ENERGIZED.
CAUTION: TERMINAL VOLTAGE
EXCEEDS 300 VOLTS.
(Remove jumper after test).
Wiring - Purple Wires (2)
Check both purple wires from (PS1)
If loose, reconnect wires. Repeat
From PS1 to GC-4A Ignition
pressure switch to ignition control.
Pressure Switch verification. If boiler
Control
Connections must be secure to
runs less than 9 seconds (with
complete circuit from module.
jumper in place), switch is ok.
If no loose wires, replace GC-4A
ignition module following instructions
packaged with replacement.