Trane RTHC - Page 98

Diagnostic Table
92 RTHC-SVD01B-EN
Chilled Water
Flow Lost
MAR
immediate
Chiller
1U1
All modes
except STOP
and
EXTERNAL
STOP
a) The chilled water flow switch input was
open for more than 6-10 contiguous
seconds. b) 6-10 seconds of contiguous
flow shall clear this diagnostic.
Check Pump, Valves,
Flow Switch
Chiller Mod
Off-Brd 5V
Range
IFW
n/a
Chiller
1U1
all An improper Off Board 5v voltage was
detected at the Chiller Module. A 5vdc is
used for off-board devices such as the
pressure transducers. The micro checks to
see that the A/D value falls within an
acceptable range.
Replace Chiller Module
Chiller: Loss of
Comm with
Rfgt Monitor
IFW
n/a
Chiller
1U1
All The Chiller module lost communications
with the Refrigerant Monitor for 15
contiguous seconds.
Check IPC Wiring/
Connections.
Chiller: Loss of
Comm with
TCI
IFW/
n/a
Chiller
1U1
All The Tracer was setup as “installed” at the
CLD and the chiller module lost
communications with the TCI (comm 3 or
comm 4) module for 15 contiguous
seconds
Check IPC Wiring/
Connections.
Chiller: Loss of
Comm with
Local CLD
IFW
n/a
Chiller
1U1
All The chiller module lost communications
with the LCLD module for 15 contiguous
seconds.
Check IPC Wiring/
Connections.
Chiller: Loss of
Comm with
Options
IFW
n/a
Chiller
1U1
All The chiller module lost communications
with the Options module for 15 contiguous
seconds.
Check IPC Wiring/
Connections.
Chiller: Loss of
Comm with
Starter
MMR
friendly
Chiller
1U1
All The chiller module lost communications
with the Starter module for 15 contiguous
seconds.
Check IPC Wiring/
Connections.
Chiller: Loss of
Comm with
Stepper
MMR
friendly
Chiller
1U1
All The chiller module lost communications
with the Stepper module for 15 contiguous
seconds.
Check IPC Wiring/
Connections.
Chiller: Loss of
Comm with
TCI
IFW
n/a
Chiller
1U1
All The Tracer was setup as "installed" at the
CLD and the chiller module lost
communicaitons with the TCI (comm 3 or
comm 4) module for 15 contiguous
seconds
Check IPC wiring/
connections
Cond Entering
Wtr Temp
Sensor
IFW
n/a
Chiller
1U1
All Open or Short 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