Hartzell CD15K - 11.3 TROUBLESHOOTING - INSPECTION RESULTS with heater on. Heat full on. Numbers in ( ) are for terminal strips numbered “4, 5, 6, 7, 8, 10.

2900 Selma Highway, Montgomery AL 36108 USA
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Page | 40
MM10001
Dated 1/1/08
Rev L dated 5/21/15
11.3 TROUBLESHOOTING - INSPECTION RESULTS with heater on. Heat full on.
Numbers in ( ) are for terminal strips numbered “4, 5, 6, 7, 8, 10.
STEP INSPECT FOR VOLTAGE CHECK PROBABLE CAUSE
1
Combustion Air:
NO air flow from exhaust
Terminal 1 (#7)
NO voltage
Circuit breaker tripped. Combustion
air blower shorted out. Replace
combustion air blower.
Fuel smell:
NO fuel smell from
exhaust
Terminal 3 (#8)
NO voltage
2
Combustion air:
YES air flow
Terminal 2 (#7)
NO voltage
See 11.4.1: Overheat switch
activated. If voltage at pin 2,
overheat condition exists. These
switches are auto-reset. Overheat
switches require a cool down of 3-5
minutes once activated.
If voltage to pin 1 of the switch but
none to pin 3, even after cool down
period, replace switch.
Fuel smell:
NO fuel smell
Terminal 3 (#8)
NO voltage
3
Combustion air:
YES air flow out exhaust
Terminal 2 (#6)
YES voltage
See 11.4.4: Adjustable duct switch
(thermostat).
Fuel smell:
NO fuel smell
Terminal 3 (#8)
NO voltage
4
Combustion air:
YES air flow
Terminal 2 (#6)
YES voltage
See 11.4.5: Cycling switch.
See 11.4.6: Fuel solenoid.
Fuel smell:
NO fuel smell
Terminal 3 (#8)
YES voltage
5
Combustion air:
YES air flow
Terminal 2 (#7)
YES voltage
See 11.4.3: Ignition.
Fuel smell:
YES fuel smell
Terminal 3 (#8)
YES voltage