Trane RTHC - IMPORTANT NOTICES; Recovery; Recycling; Reclaiming

Contents
RTHC-SVD01B-EN i
Control Operation, Setup and Troubleshooting for RTHC Units
with UCP2 Controls ................................................................1
Introduction ........................................................................................ 1
Discussion .......................................................................................... 1
Units Affected ..................................................................................... 1
Overview ..................................................................................1
General .............................................................................................. 1
Service Philosophy ............................................................................. 1
System Description ............................................................................ 2
1U1 - UCM Chiller Module ................................................................. 2
1U2 - Starter Module .......................................................................... 2
1U3 - Stepper Module ........................................................................ 2
1U4 - Clear Language Display ........................................................... 3
1U5 - UCM Options Module ............................................................... 3
1U6 - TCI Comm 3 or TCI Comm 4 ................................................... 3
1U7 - Printer Interface ....................................................................... 3
4U1 - Adder Subtractor Module for Optional Condenser
Water Regulating valve. ..................................................................... 3
Menu Item Description ...........................................................5
General .............................................................................................. 5
Restart Inhibit Timer ........................................................................... 5
Soft Loading ....................................................................................... 8
External Base Loading ....................................................................... 9
Start to Transition Timing Logic ....................................................... 10
Leaving Water Temperature Control ................................................ 11
EXV Settings .................................................................................... 11
Liquid Level Control ......................................................................... 12
Temperature Sensors ...........................................................15
General ............................................................................................ 15
Sensor Checkout Procedure ............................................................ 15
Current Transformer and Current Input .............................23
General ............................................................................................ 23
CT and Starter Module Current Input Checkout Procedure ............. 29
Under-Over Voltage Transformer ........................................35
General ............................................................................................ 35
Under-Over Voltage Transformer Checkout .................................... 35
Compressor Load-Unload Solenoid ...................................37
General ............................................................................................ 37
Check Procedure for 1U1 Load-Unload Outputs ............................. 37
Checkout Procedure for the Slide Valve and Load-Unload
Solenoids ......................................................................................... 39