Table 7 - Tubular Propeller Troubleshooting Guide (continued)
SYMPTOMS |
| POSSIBLE CAUSE(S) |
| CORRECTIVE ACTION |
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I. Burners will not shut off. | 1. Thermostat located incorrectly. | 1. | Relocate thermostat away from outside | |
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| wall or drafts. |
| 2. | Improper thermostat wiring. | 2. | Check thermostat circuit for open and close |
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| on terminal strip on heater “R” and “W”. |
| 3. | Shorted circuit. | 3. | Check thermostat circuit for shorts “staples |
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| piercing wires”. |
| 4. | Defective sticking gas valve. | 4. | Check for 24v on gas valve terminals when |
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| thermostat is not calling. |
| 5. | Excessive gas supply pressure. | 5. | Refer to “Installation”. |
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J. Rapid burner cycling. | 1. Loose electrical connections at thermostat | 1. | Tighten all electrical connections. | |
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| or gas valve. | 2. | Adjust heat anticipator setting for longer |
| 2. | Excessive thermostat heat |
| cycles. Refer to “Electrical Connections”. |
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| anticipator setting. | 3. | Check for proper air supply across heat |
| 3. | Unit cycling on high limit. |
| exchanger and proper gas supply. |
| 4. | Poor thermostat location. | 4. | Relocate thermostat . |
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K. Noisy power ventor. | 1. Power ventor wheel loose. | 1. | Replace or tighten. | |
| 2. | Power ventor wheel is dirty. | 2. | Clean power ventor wheel. |
| 3. | Power ventor wheel is rubbing on the housing. | 3. | Realign power ventor wheel. |
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L. Fan will not run. | 1. Loose electrical connections. | 1. | Check and tighten wires on fan circuit. | |
| 2. | Defective motor or overload. | 2. | Test for 115v on terminal ACB Heat and |
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| “L2” if voltage is present replace motor. |
| 3. | Defective control board. | 3. | Test for 115v on terminal ACB Heat and “L2” |
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| on the control board, if voltage is not present |
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| 45 seconds after trial for ignition replace |
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| board. |
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M. Fan motor turns on and off | 1. Motor overload protection is tripping. | 1. | Check motor amps against motor name | |
while burner is operating. |
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| plate, check voltage, replace if found defective. |
| 2. | Loose wiring or connection. | 2. | Check for 115v between motor leads. |
| 3. | Control board is defective. | 3. | Check terminal ACB Heat for voltage if |
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| voltage not constant, replace board. |
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N. Fan will not stop. | 1. Control Board is in flame failure mode. | 1. | Turn 115v power off to the unit, wait 10 | |
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| seconds and reapply voltage to the unit. |
| 2. | Fan improperly wired. | 2. | Check wiring of fan circuit to wiring diagram. |
| 3. | Defective board. | 3. | If unit is not calling for heat and board is not |
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| in a flash code mode, replace board. |
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O. Not enough heat. | 1. Incorrect gas input. | 1. | Refer to “Operation”. | |
| 2. | Heater undersized. | 2. | Is the heater output sized correctly for |
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| heat loss of the space. Has the space |
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| been enlarged. |
| 3. | Thermostat malfunction. | 3. | Check thermostat circuit, 24v on terminals |
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| “R” and “W” on terminal strip. |
| 4. | Heater cycling on limit. | 4. | Check air movement across heat exchanger. |
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| Check voltage and amps at the fan motor. |
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| Check gas input to ensure unit is not over |
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| fired. Check heat exchanger to ensure unit |
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| is not dirty. |
| 5. | Incorrect orifice sizes. | 5. | Check orifice size, replace if undersized. |
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P. Too much heat. | 1. Unit is over fired. | 1. | Refer to “Operation”. Check orifice size. | |
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| If too big replace. |
| 2. | Thermostat malfunction. | 2. | Check thermostat for operation, to ensure |
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| circuit open and closes. |
| 3. | Heater runs continuously. | 3. | Check wiring per diagram; check |
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| operation at the gas valve, look for |
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| a short in thermostat circuit. |
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24
