Trane CVHE Troubleshooting

CVHE-SB-32A 39
UCP2 Modules
Chiller Module
1U1 is the “Master module,” collecting data, status conditions, diagnostic information, etc. from
modules (over the IPC link) from sensors and remote contacts and, in turn, communicating
commands to other modules.
1U1 performs leaving water temperature and limits control algorithms, trading off chiller capacity
against various “limits” that the chiller may be working against. 1U1 checks for valid setpoints
and identifies unit type for other modules.
Low Voltage (<30VAC) Inputs:
24 VAC, IPC Links to Internal, to Purge and to Starter modules; Evap. EWT and LWT; Cond.
EWT and LWT; External Auto Stop; Emergency Stop; Ambient Air CWR; Heat Pump Control;
Evap. Water Delta P; Cond. Water Delta P
High Voltage (>30VAC) Outputs:
Evap. Water Pressure Solenoid; Cond. Water Pressure Solenoid; Evap. Water Pump Relay;
Cond. Water Pump Relay; Compressor Run Relay; MMR Alarm Relay; MAR Alarm Relay;
Limit Warning Relay
Figure 2
Chiller Module
IP Communication
Evap EWT
Evap LWT
Cond EWT
Ext. Auto-Stop
Emerg. Stop
Outdoor Ambient Temp
Ext. Base Load
J1
J3
J5
J7
J9
J2
J4
J6
J12
J14
J16
J18
J20
J24
J26
J28
Ext. Base Load Setpt
Evap. EWP and LWP
(Optional)
Cond. EWP and LWP
Evap. Water Press. Sol
Cond. Water Pres. Sol.
Chilled Water Pump Relay
Cond. Water Pump Relay
Comp. Run Relay
Mach. Man. Alarm Relay
Limit Warning Relay
Mach. Auto Alarm Reset
Chilled Water Flow Switch
Cond. Water Flow Switch
24 VAC
Cond LWT

Trane CVHE Specifications

General

Brand	Trane
Model	CVHE
Category	Chiller
Language	English