Fault |
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| Lockout |
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Code | Description | Cause |
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| Remedy | |
| type |
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Displayed |
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E30 | Blower Error. | Locked Rotor. |
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| 1. | Check the blower wire harness. |
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| Soft | 2. | Change the blower. |
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| 3. Change the board. | |
E33 | Water Flow Valve | The water valve did not |
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| 1. Check the water valve wire harness. | |
| Closed. | open when attempting to |
| Soft | 2. Change the board. | |
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| establish flow. |
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| 3. | Change the water valve. |
E34 | Proportional Valve | The closed loop control |
|
| Check the proportional gas valve wire | |
| (PV) Response | of the proportional valve |
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| harness, change the board, change | |
| Too Slow. | is not functioning properly |
| Soft | the gas valve assembly | |
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| (control error) or the valve |
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| |
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| |
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| is responding slowly (valve |
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| failure). |
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E35 | Repeated Flame | Low Gas Inlet Pressure. |
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| Check the flame rod wire harness, | |
| Loss Fault. |
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| check line gas pressure. If it is above | |
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| Soft | 5” WC check the flame rod and if it | |
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| looks dirty, clean it up using isopropyl | ||
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| alcohol and a clean cloth, change the | |
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| flame rod, change the board | |
E36 | Calibration error. | Calibration sequence |
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| 1. | Unplug the power cord, check the |
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| incomplete because end |
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| DIP switch 4 position and put it in |
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| of |
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| ON position. |
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| the calibration time, or |
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| 2. | Increase the set point so that a |
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| calibration sequence not |
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| |
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| initiated because of lack of |
| Soft | 3. | Drain the tank in order to lower the |
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| water temperature so that a “call- | |
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| has been never calibrated |
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| |
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| or Calibration is successful |
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| 4. | Set DIP switch 4 to OFF position. |
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| but DIP switch 4 not set to |
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| 5. | Recalibrate the unit. |
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| “normal”. |
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| 6. | Change the board. |
E37 | No Water Flow. | The heater could not start |
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| 1. | Check the water inlet on the heat |
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| because the water flow was |
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| engine. |
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| not established. This can be |
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| 2. | Make a water draw during first 60 |
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| caused by an air bubble or a |
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| seconds after putting the unit in ON |
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| blockage in the heat engine |
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| mode (to evacuate possible air from |
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| water passage, a failed flow |
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| the heat engine water passage). |
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| sensor or a failed circulation |
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| 3. | Check wire harness for pump, water |
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| pump. |
| Soft |
| valve and water flow sensor. |
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| 4. Check the pump 120Vac voltage | |
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| supply (the pump shall be energized |
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| during the heating mode). |
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| 5. | Clean or change the water filter. |
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| 6. Change board. | |
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| 7. Change pump. | |
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| 8. Change water valve. | |
E99 | Board Failure. | An internal diagnostic check |
| Soft | Change the board. | |
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| on the board has failed. |
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| TABLE 5 |
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Lockout types: |
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Continuous. Needs “Cycle the Power” or service to restart. |
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Soft. Will try to automatically recover and restart after 20 minutes. |
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Auto. Will automatically restart when voltage returns to acceptable parameters. |
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Alert. Will only display an error code in diagnostic mode. |
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