Trane RTHC - REFRIGERANT EMISSION CONTROL; Refrigerant recovery, recycling, and reclamation

ii RTHC-SVD01B-EN
Contents
Starter Dry Run .....................................................................43
General ............................................................................................ 43
Timing Requirements ....................................................................... 43
Dry Run Procedure .......................................................................... 45
Electronic Expansion Valve .................................................47
General ............................................................................................ 47
Stepper Module Checkout Procedure .............................................. 47
EXV Motor and Wiring Checkout Procedure .................................... 48
Motor Winding Resistance Checkout ............................................... 48
Motor Voltage Checkout Procedures ............................................... 49
Liquid Level Sensor Checkout ............................................51
General ............................................................................................ 51
Checkout procedure ......................................................................... 51
Gas Pump Checkout ............................................................53
General ............................................................................................ 53
Gas Pump Checkout Procedure - Unit Off ....................................... 53
Gas Pump Checkout Procedure - Unit On ....................................... 54
RTHC Optical Sensor ...........................................................57
General ............................................................................................ 57
Checkout Procedure ........................................................................ 57
Interprocessor Communication (IPC) .................................59
General ............................................................................................ 59
IPC Diagnostics ................................................................................ 59
Troubleshooting Modules Using IPC Diagnostics ............................ 60
Opens or shorts in the twisted pair IPC wiring or connectors: ......... 61
Loss of power to a module: .............................................................. 61
Internal module failure: ..................................................................... 62
Incorrect Polarity: ............................................................................. 62
High levels of Electro-Magnetic Interference: .................................. 62
Module specific function selected without the Options Module: ....... 62
Loss of common ground: .................................................................. 62
Procedure for Troubleshooting IPC Communication Diagnostics .... 63
Communication Diagnostics ............................................................. 63
Troubleshooting Data Not Valid Diagnostics ................................... 64
For a "Loss of Comm with Stepper" diagnostic: .............................. 64
Module Power and Miscellaneous I/O .................................67
General ............................................................................................ 67
Power Supply ................................................................................... 67
Clear Language Display (CLD) Keypad Overview (1U4) ................. 67
General ............................................................................................ 67
Select Report Group ........................................................................ 68