Product troubleshooting
Trane 5DCZ5030A1 troubleshooting and error codes
These codes are matched from manufacturer documentation to this model's series or control platform. Keep checks visible and safe; do not open electrical, refrigerant, gas, combustion, or sealed equipment compartments.
Source-backed code set
13 matched codes
| Code | Meaning | System area | Priority |
|---|---|---|---|
| MCB 2 Flash | Active sensor communication error | Refrigerant mitigation control board | Urgent |
| MCB 3 Flash | Active refrigerant leak or sensor-failure alarm | Refrigerant mitigation control board | Urgent |
| MCB 4 Flash | Past refrigerant detected alarm | Refrigerant mitigation control board | Urgent |
| MCB 5 Flash | Past sensor communication error | Refrigerant mitigation control board | Urgent |
| MCB 6 Flash | Past sensor error | Refrigerant mitigation control board | Urgent |
| MCB 7 Flash | Past sensor communication or sensor error | Refrigerant mitigation control board | Urgent |
| IGN Steady Off | Check power or failed board | Ignition board | Urgent |
| IGN 2 Flashes | System lockout: failed to detect or sustain flame | Ignition and flame sensing | Urgent |
| IGN 3 Flashes | Pressure switch problem detected | Pressure switch circuit | Urgent |
| IGN 4 Flashes | High limit switch protection device open | High limit safety circuit | Urgent |
| IGN 5 Flashes | Flame sensed without the gas valve energized | Ignition and gas-valve control | Urgent |
| IGN 6 Flashes | Flame rollout switch open | Flame rollout safety circuit | Urgent |
| IGN 7 Flashes | Thermostat W1/W2 wiring issue | Thermostat and low-voltage wiring | Urgent |
No matching error codes found.