10
TROUBLE SHOOTING
NOTE: MUST CHECK COMPONENTS IN SEQUENCE LISTED
DIRECTIONS:
Find the specific
symptom
. Refer to
Sequence of component Operation Guide.
Check the components listed with a
voltmeter
for proper operation as described. Replace any com-
ponents not operating correctly.
Fan will not start when fan switch and thermostat are ON.
• Check sequences 1 through 5 (Page 9)
• Push reset button on Motor Overload Relay
Fan runs, no spark for ignition.
• Check sequences 6 through 9 (Page 9)
• Check continuity of igniter leads. Replace if shorted or broken.
• Check igniter for carbon buildup, gap spacing (1/8”), secure mounting
• Replace igniter if porcelain is cracked or if electrodes are rubbery
Have spark but no flame.
• Check sequences 9 through 11 (Page 9)
• Check for gas pressure on the manifold gauge, if gas is present, clean the burner port holes
Flame occurs but burner locks out after a few seconds.
• Check burner ground wire (Bad connections)
• Check sensor wire (Burned wire or bad connection)
• Check igniter/sensor (Replace if probe is rubbery)
• Clean port holes in burner around igniter/sensor
• Replace ignition control board
Flame occurs but trips pressure reset button after 30 to 40 seconds.
• Pressure regulator is set too high.
• Limit switch shuts burner off.
• Adjust pressure regulator to proper setting. (1”W.C. LP Max, 2.5” W.C. Nat. Max)
• Indicator light will glow when proper setting is obtained.
Flame established, but too small.
A: Check for proper pressure at manifold gauge — (if yes)
1. Clean port holes in burner
B: Not enough pressure at manifold gauge.
1. Check fuel supply
2. Check liquid strainer — Filter at the “Y” fitting. (Liquid Propane model only) for restriction
from dirt, oil, etc.
3. Check high pressure regulator for similar restriction.
4. Check gas solenoid valve for similar restrictions.
Summary of Contents for 2730C
Page 14: ...14 480 Volt 3 PH 240 Volt 3 PH ...
Page 15: ...15 240 Volt 1 PH ...
