Crawford Cdm9 950 Installation Manual
The CDM9 950 includes an advanced auto-tune algorithm. The manual outlines two methods: standard AT and adaptive AT.
Warning: This guide is a high-level summary. Follow the official manufacturer manual and all local electrical/safety codes. Use qualified installers for electrical and mechanical work. crawford cdm9 950 installation manual
Before you close the electrical panel and begin production, run through this final checklist adapted from the manual’s "Pre-Start Safety Audit": The CDM9 950 includes an advanced auto-tune algorithm
Even with the Crawford CDM9 950 installation manual in hand, mistakes happen. Here is a troubleshooting guide derived from the manual’s appendix: Perform the motor auto-tuning sequence (see Section 6
| Error Display | Probable Cause | Manual’s Fix |
| :--- | :--- | :--- |
| S.ERR | Sensor broken or wired backwards | Check polarity (thermocouple: red = negative, yellow/white = positive). |
| UUUU | Input over-range (>10% above max) | Sensor short circuit (for RTD) or wrong Lin.H scaling. |
| LLLL | Input under-range | Thermocouple reversed or sensor disconnected. |
| AL1 flashing | Alarm 1 active | Normal operation; check if relay is wired correctly. |
| Erratic PV | Electrical noise | Move signal wires away from power wires. Check shield grounding. |
| Output LED on, but load cold | Blown fuse or no power to load | Check external 2A fuse. Verify the relay contacts are closing (measure continuity). |
If you are using the CDM9 950 to fire an SCR power regulator:
