Trane RTHC - Daily Unit Start-Up; NOTE: Unless the UCP2 and building automation system are controlling the chilled water pump...

Diagnostic Table
RTHC-SVD01B-EN 103
Starter: Loss of
Comm with
Chiller
MMR
immediate
Starter
1U2
All The starter module lost communications
with the Chiller module for 15 contiguous
seconds.
Check IPC wiring and
connections.
Stepper: Loss
of Comm with
Chiller
MMR
friendly
Stepper
1U3
All The Stepper #1 module lost
communications with the Chiller module for
15 contiguous seconds.
Check IPC wiring and
connections.
Stepper: Loss
of Comm with
Starter
MMR
friendly
Stepper
1U3
All The Stepper #1 module lost
communications with the Starter module for
15 contiguous seconds.
Check IPC wiring and
connections.
TCI: Loss of
Comm with
Chiller
IFW
n/a
TCI
1U6
All The TCI module lost communications with
the Chiller module for 15 contiguous
seconds.
Check IPC wiring and
connections.
TCI: Loss of
Comm with
Options
IFW
n/a
TCI
1U6
All The TCI module lost communications with
the Options module for 15 contiguous
seconds.
Check IPC wiring and
connections.
TCI: Loss of
Comm with
Starter
IFW
n/a
TCI
1U6
All The TCI module lost communications with
the Starter module for 15 contiguous
seconds.
Check IPC wiring and
connections.
TCI: Loss of
Comm with
Stepper
IFW
n/a
TCI
1U6
All The TCI module lost communications with
the Stepper #1 module for 15 contiguous
seconds.
Check IPC wiring and
connections.
Tracer
Communicatio
ns Lost
IFW
n/a
TCI
1U6
All The Tracer was setup as “installed” at the
CLD and the TCI lost communications with
the Tracer for 15 contiguous minutes after it
had been established. Continue to run the
chiller with the last valid Tracer Setpoints/
Mode.
Check Tracer to UCP
wiring and connections.
Tracer failed to
Establish
Comm
IFW
n/a
TCI
1U6
At power-up The Tracer was setup as “installed” at the
CLD and the Tracer did not communicate
with the TCI within 2 minutes after power-
up.
Check Tracer to UCP
wiring and connections.
Tracer Outdoor
Air Temp
Sensor Fail
IFW
n/a
Chiller
1U1
All Tracer sensor open or shorted. Check sensor, wiring,
and connections.
Tracer
Temperature
Sensor
IFW
n/a
Options
1U5
All Input Shorted. Check sensor, wiring,
and connections.
Table 14-2: Diagnostic Table
Diagnostic
Description
Type/
Shutdown
Action
Module
Calling
Out Diag.
Operating
Modes
Diagnostic is
Active
Cause Help Message