TROUBLESHOOTING
Table 8.2: P125 Control Board Fault Codes
Fault |
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Code | Description |
| Corrective Action | |
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| 1. | Check circulation pump operation. | |
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| 2. | Assure that there is adequate flow through the boiler by accessing the status menu | |
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| and confirming that there is less than a 50°F rise from the return thermistor to the | |
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| supply thermistor. | |
F00 | High Limit Exceeded. | 3. | If gray thermostat wires are being used, disconnect them and jump them together. | |
| If F00 code can be reset check thermostat circuit for short circuit or stray voltage. | |||
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| 4. | Check supply temperature reading on LED display. Replace High Limit Switch if | |
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| supply temperature is below 210°F. | |
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| 5. | Temporarily jump out Water Pressure Switch. If F00 code can be reset check wiring | |
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| harness and connections. If wiring harness is okay replace Water Pressure Switch. | |
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| 1. | Push the red reset button on the switch. | |
F01 | Vent Temperature Limit Exceeded. | 2. | Check the flue temperature during operation using a combustion analyzer. | |
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| 3. | Replace the switch if faulty. | |
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F02 | Interrupted or Shorted | 1. | Check the electrical connection to the thermistor on the outlet manifold. | |
Supply (Outlet) Thermistor. | 2. | Replace thermistor if necessary. | ||
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F03 | Interrupted or Shorted | 1. | Check the electrical connection to the thermistor on the inlet manifold. | |
Return (Inlet) Thermistor. | 2. | Replace thermistor if necessary. | ||
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| 1. | Check circulation pump operation. | |
F05 | Supply (Outlet) | 2. | Assure that there is adequate flow through the boiler by accessing the status menu | |
Temperature exceeded 230°F. |
| and confirming that there is less than a 50°F rise from the return thermistor to the | ||
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| supply thermistor. | |
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| 1. | Check circulation pump operation. | |
F06 | Return (Inlet) Temperature | 2. | Assure that there is adequate flow through the boiler by accessing the status menu | |
exceeded 230°F. |
| and confirming that there is less than a 50°F rise from the return thermistor to the | ||
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| supply thermistor. | |
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| 1. | Watch the igniter through the observation window provided. | |
| No flame detected – The boiler will make three | 2. | If there is no spark, check the spark electrode for the proper ¼" gap. | |
F09 | attempts at ignition before the control goes into | 3. | Remove any corrosion from the spark electrode. | |
| this lockout condition. | 4. | If there is a spark but no flame, check the gas supply to the boiler. | |
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| 5. | If there is a flame, check the flame sensor. | |
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| 1. | Check the gas pressure to the gas valve while the unit is in operation. | |
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| 2. | Assure that the flame is stable when lit. | |
| Loss of Flame Signal – The boiler will relight 4 | 3. | Check to see if the green light on the display module is out while the boiler | |
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| is running. | ||
F10 | times before the control goes into this lockout |
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4. | If the green light doesn't come on or goes off during operation check the flame | |||
| condition. | |||
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| signal on the status menu. | ||
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| 5. | If the signal reads less than 1 microampere, clean the flame sensor. | |
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| 6. | If the sensor continues to read low, replace it. | |
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| 1. | Turn the gas off to the unit at the service valve. | |
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| 2. | If the flame signal is still present replace the flame rod. | |
| False Flame Signal – The boiler will lock out if | 3. | If the flame signal is not present after turning off the gas supply, check | |
F11 | it senses a flame signal when there should be |
| the gas valve electrical connection. | |
| none present. | 4. | If there is no power to the gas valve, remove the valve and check for obstruction | |
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| in the valve seat or replace the gas valve. | |
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| 5. | Turn the gas on at the service valve after corrective action is taken. | |
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| Combustion Fan Speed Low – The boiler will | 1. | Check the combustion air fan wiring. | |
F13 | lock out if it senses that the fan speed is less than | 2. | Replace the combustion air fan. | |
| 70% of expected for more than 60 seconds. | 3. | Replace the control board. | |
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| Combustion Fan Speed High – The boiler will | 1. | Check the combustion air fan wiring. | |
F14 | lock out if the fan speed is more than 130% of | 2. | Replace the combustion air fan. | |
| expected for more than 60 seconds. | 3. | Replace the control board. | |
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| 1. | Make sure the connector is correctly connected to the gas valve. | |
F18 | Gas Valve Error | 2. | Check the electrical wiring from the valve to the control board. | |
3. | Replace the gas valve. | |||
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| 4. | Replace control board. | |
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F30 | Watchdog | Call factory for further assistance. | ||
F31 | Parameter Memory | Call factory for further assistance. | ||
F32 | Parameter Memory Write Error | Call factory for further assistance. | ||
F33 | Programming Error | Call factory for further assistance. | ||
| Neutral Fault – Boiler locks out if it senses | 1. | Check for adequate supply voltage. | |
NC | a voltage drop or power feedback on the | |||
2. | Check for power feedback on the neutral wire. | |||
| neutral wire. | |||
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