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Information Manual 81
Starter: Loss of Comm with
Chiller
MMR Starter All The starter module lost communications with the
Chiller module for 15 contiguous seconds.
Check IPC
Wiring/
Connections
Starter Mod Ref Voltage
Calibration
IFW Starter All An improper reference voltage was detected at
the Starter Module. A 2.5 vdc reference is used
to calibrate the non-ratiometric analog I/O such
as 2-10vdc and 4-20ma inputs as well as PWM
Analog outputs. The micro checks to see that the
A/D value falls within an acceptable range.
See
Troubleshooting
Service Bulletin
Stepper #1:Loss of Comm with
Starter
MMR Stepper All The Stepper #1 module lost communications
with the Starter module for 15 contiguous
seconds.
Check IPC
Wiring/
Connections
Stepper #1:Loss of Comm with
Chiller
MMR Stepper All The Stepper #1 module lost communications
with the Chiller module for 15 contiguous
seconds.
Check IPC
Wiring/
Connections
Surge Shutdown: Ice Building MAR Starter All Ice
Building
Modes
An extended Surge condition was detected while
in Ice Building Mode. This diagnostic shall clear
when the Ice Building command is withdrawn.
See
Troubleshooting
Service Bulletin
TCI: Loss of Comm with Purge IFW TCI All The TCI module lost communications with the
Purge module for 15 contiguous seconds.
Check IPC
Wiring/
Connections
TCI: Loss of Comm with Starter IFW TCI All The TCI module lost communications with the
Starter module for 15 contiguous seconds.
Check IPC
Wiring/
Connections
TCI: Loss of Comm with Options IFW TCI All The TCI module lost communications with the
Options module for 15 contiguous seconds.
Check IPC
Wiring/
Connections
TCI: Loss of Comm with Circuit IFW TCI All The TCI module lost communications with the
Circuit module for 15 contiguous seconds.
Check IPC
Wiring/
Connections
TCI: Loss of Comm with Chiller IFW TCI All The TCI module lost communications with the
Chiller module for 15 contiguous seconds.
Check IPC
Wiring/
Connections
TCI: Loss of Comm with
Stepper #1
IFW TCI All The TCI module lost communications with the
Stepper #1 module for 15 contiguous seconds.
Check IPC
Wiring/
Connections
Tracer Communications Lost IFW TCI 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/
Connections
Tracer failed to Establish Comm IFW TCI 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
Wiring/
Connections/
Power
Tracer Outdoor Air Temp
Sensor Fail
IFW Chiller All Check Sensor,
Wiring, and
Connections
Tracer Temperature Sensor IFW Options All Input Shorted. Check Sensor,
Wiring, and
Connections
Transition Complete Input
Shorted
MMR Starter Pre-Start a. The Transition Complete input was found to
be shorted before the compressor was started.
b. This is active for all electromechanical
starters.
Check transition
complete
contact
DIAGNOSTIC DESCRIPTION
Diag
Type
Module
that
Called
Diag.
Diag.
Active
Modes
CAUSE Help Message
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