Procedures For Module Set-Up; External Current Limit Setpoint; Refrigerant Monitor Input; Rla Output - Trane CVHE Troubleshooting Manual

External Current Limit Setpoint

Option module J7-11, -12
Isolated 2-10 VDC or 4-20 mA
UCP2 will accept either a 2-10 VDC or 4-20 mA analog input suitable for customer
connection to set the unit external current limit setpoint. 2-10 VDC and 4-20 mA shall each
correspond to a 40 to 120% RLA range. UCP2 will limit the maximum ECLS to 100%.
The following must be "Set'.
1 SW2-1 OFF for 2-10 VDC
ON for 4-20 mA
2 Current Limit Setpoint Source: External Source
3 External Current Limit Setpoint: Installed Machine Configuration menu
4 External Setpoint Inputs: 2-10 VDC or 4-20 mA (Machine Configuration menu)

Refrigerant Monitor Input

Analog type input
4-20 mA input signal to the Circuit module J5-5 and J5-6. This represents 0-100 ppm.
Under machine configuration "Refrigerant Monitor Type" is '01' for Analog.
Typical input if using an RMWC generation Monitor.
IPC Monitor (Requires RMWD monitor with Version 2 Software) Direct communication to the
CLD via the IPC.
Under Machine Configuration "Refrigerant Monitor Type" is '02' for IPC Monitor.
Also allows monitor calibration and setup. Please note that the monitor cannot have a local
display and communicate with the UCP2. If the customer requires a local display, he can
connect an RMWD style monitor up like an analog type previously described.

% RLA Output

Options module J7-3,-4
-2-10 VDC
As an option, the UCM shall provide a 0-10 VDC analog output to indicate % RLA. The
transfer function shall be 2 to 10 VDC corresponding to 0 to 120% RLA.
CVHE-SB-32A

Procedures For Module Set-Up

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