Symbio 700 Ignition Diagnostics LED 1
| Steady OFF | No Power/Failure/ Internal Failure |
| Steady ON | Normal – No Call for heat |
| Slow Flash Rate | Normal, call for heat (¾ second on, ¼ second off) |
| 1 Flash | Loss of Communication |
| 2 Flashes |
System Lockout: Failed to detect or sustain a flame. (failure to ignite, no spark, low/no gas pressure, etc.) |
| 3 Flashes | Pressure switch problem detected. (no vent air flow, bad CBM, closed at an initial call for heat). Auto reset. |
| 4 Flashes | High Limit switch protection device open (excessive heat in combustion chamber, low airflow). Auto reset. |
| 5 Flashes | Flame sensed and gas valve not energized, or flame sensed and no call for heat. |
| 6 Flashes | Flame Rollout Switch open. (CBM failure, incorrect gas pressure, incorrect primary air). Requires manual reset of the switch. |
| 7 Flashes | Weak Flame |
| 8 Flashes | Internal Error |
| 9 Flashes | Hardware Mismatch |
WARNING:
Information in this article is intended for use by individuals possessing adequate backgrounds of electrical and mechanical experience and who comply with all federal, state, and local laws, rules, orders, or regulations related to the installation, service, or repair of a heating or central air conditioning product. Any attempt to install, service, or repair a heating or central air conditioning product may result in personal injury and/or property damage. The manufacturer or seller cannot be responsible for the interpretation of the information contained herein, nor can it assume any liability in connection with its use.