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