Trane Package Unit: YSC
Re: Ignition Lockout Codes
Trane YSC package units are multi-stage gas/electric units.
Light Status | Description |
Off | Check Control Power |
Continuous On | Normal, No Heat Call |
Slow Flash | Normal, Call for Heat |
Fast Flash | Internal Control Failure |
1 | Communication Failure |
2 | Ignition Lockout |
3 | Pressure Switch Problem |
4 | High Limit (TCO1 or TCO2) Open |
5 | Flame Sensed with Gas Valve Off |
6 | Flame Rollout Switch (FL) Open |