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| Form: |
| 2396 | |
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Code | Description |
| Recommended Troubleshooting of Lockout Codes |
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| Code | |||
122 | Lightoff | rate | 1. | Check wiring and correct any potential wiring errors. |
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| L | ||
| proving failed | 2. | Check VFDs ability to change speeds. |
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123 | Purge |
| rate | proving | 3. | Change the VFD |
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| L |
| failed |
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| 4. | If the fault persists, replace the module. |
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124 | High |
| fire | switch | 1. | Check wiring and correct any potential wiring errors. |
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| H |
| OFF |
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| 2. Check High Fire Switch to assure proper function (not welded |
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125 | High |
| fire | switch | or jumpered). |
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| H | |
| stuck ON |
| 3. Manually drive the motor to the High Fire position and adjust |
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126 | Low |
| fire | switch | the HF switch while in this position and verify voltage through |
| H | ||
| OFF |
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| the switch to the HFS input with a voltmeter. |
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127 | Low |
| fire | switch | 4. | If steps |
| H or L | |
| stuck ON |
| module. |
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128 | Fan | speed | failed | 1. | Check wiring and correct any potential wiring errors. |
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| H or L | |
| during prepurge | 2. | Check VFDs ability to change speeds. |
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129 | Fan | speed | failed | 3. | Change the VFD |
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| H or L | |
| during preignition | 4. | If the fault persists, replace the module. |
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130 | Fan | speed | failed |
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| H or L | |
| during ignition |
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131 | Fan |
| movement |
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| H | |
| detected | during |
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| standby |
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132 | Fan | speed | failed |
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| H | |
| during run |
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133- | RESERVED |
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135 |
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136 | Interrupted | Airflow | 1. | Check wiring and correct any possible wiring errors. |
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| H | ||
| Switch | failed to | 2. | Check Interrupted Airflow switch(es) to assure proper |
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| close |
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| function. |
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| 3. | Verify voltage through the airflow switch to the IAS input with |
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| a voltmeter. |
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| 4. | If steps |
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| module. |
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137 | ILK failed to close | 1. | Check wiring and correct any possible shorts. |
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| H | |||
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| 2. | Check Interlock (ILK) switches to assure proper function. |
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| 3. Verify voltage through the interlock string to the interlock input |
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| with a voltmeter. |
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| 4. | If steps |
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| module. |
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138- | RESERVED |
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148 |
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| FAULT | CODES |
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| 149 |
| THROUGH |
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| 165 | ARE | OEM |
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| SPECIFIC | FAULT |
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| CODES. |
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149 | Flame detected | OEM Specific |
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| H or L | ||||
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| 1. | Holds if flame detected during Safe Start check up to Flame |
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| Establishing period. |
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150 | Flame not detected | OEM Specific |
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| H | ||||
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| 1. | Sequence returns to standby and restarts sequence at the |
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| beginning of Purge after the HF switch opens. if flame detected |
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| during Safe Start check up to Flame Establishing period. |
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151 | High fire switch ON | OEM Specific |
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| H or L | ||||
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| 44 |
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