| Symptom | Likely Wiring Fault | | :--- | :--- | | Inducer never runs | No 120V to IND terminal or bad limit string. | | Spark but no pilot | Missing 24V at PV terminal. Check MV/PV common return. | | Pilot lights but no main valve | MV terminal not sending 24V. Check gas valve coil resistance (20-60 ohms). | | Lockout (no spark) | Poor ground (GND). Module requires chassis ground for spark return. | | Intermittent flame loss | Loose SENSE wire or high voltage wire routed too close to sense wire. |
: Disconnect power and wait 12 minutes for capacitors to discharge before touching any electrical components. delcos 3100 wiring diagram
If you encounter incorrect readings after following the wiring diagram, the problem may lie in the calibration or the sensor itself. For example, if pressure readings are inconsistent (e.g., loading/unloading at the wrong intervals), technicians often check the or wiring continuity at the terminal strip. | Symptom | Likely Wiring Fault | |
Delcos 3100 is a sophisticated microprocessor control system used for CompAir stationary screw compressors. Its wiring architecture is designed to handle multiple compressor versions, including fixed-speed (FS), speed-controlled (RS), and SR-drive (SR) units. Best Aire Compressor Services, Inc. Core Wiring Architecture | | Pilot lights but no main valve
: Interfaces for emergency stop buttons, remote start/stop, and remote load signals.
: The diagram outlines essential connections for power, neutrals, and grounds. High-voltage components, like power capacitors, require careful handling; the system must be disconnected for at least 12 minutes before touching electrical components to allow for safe discharge.
: Terminals for Main Contactor, Delta Contactor, and Star Contactor.