Trane IntelliPak CGAF Series - Page 52

52
System Testing & Troubleshooting
DIAGNOSTIC DISPLAYED REASON FOR DIAGNOSTIC UCM’S REACTION RESET REQUIRED
Evaporator Entering Solution Temperature Sensor Fail Problem: The Evaporator Entering Solution Temperature Sensor input is out of range. Check: Sensor resistance between 830 ohms (200 F) and 345.7Kohms (-40 F). If so, check field/unit wiring between Sensor and CGM.
The unit is reading a signal that is out of range for this input on the CGM. (Temp < -40 F or Temp > 200 F).
When this diagnostic is active: a. A "Lockout Ckts" request is sent to the compressor staging function. All Compressor Relays, LPC Bypass relays, and Liquid Line Solenoids will be de-energized. Min On times, HGBP, and Pumpdown will be bypassed. b. If Leaving Solution Reset type selected is Entering Solution Reset, then the Reset type reverts to NONE for the duration of the failure. c. Evaporator Solution Pump Control is not affected. d. The Heat Tape relay output will energize.
(PMR) A manual reset is required after this diagnostic occurs. The Diagnostic can be reset by the unit mounted Human Interface Module or Tracer, or by cycling power to the CGM.
Evaporator Leaving Solution Temperature Sensor Fail Problem: The Evaporator Leaving Solution Temperature sensor input is out of range. Check: Sensor resistance between 830 ohms (200 F) and 345.7Kohms (-40 F). If so, check field/unit wiring between Sensor and CGM.
The unit is reading a signal that is out of range for this input on the CGM (Temp < -40 F or Temp > 200 F).
When this diagnostic is active: a. A "Lockout Ckts" request is sent to the compressor staging function. All Compressor Relays, LPC Bypass relays, and Liquid Line Solenoids will be de-energized. Min On times, HGBP, and Pumpdown will be bypassed. b. The following functions will be disabled: 1) Compressor Staging, 2) Process/Comfort Cooling, 3) Ice Building. c. Evaporator Solution Pump Control is not affected. d. The Heat Tape relay output will energize.
(PMR) A manual reset is required after this diagnostic occurs. The Diagnostic can be reset by the unit mounted Human Interface Module or Tracer, or by cycling power to the CGM.