Diagnostics Tables - Trane CVRC-M-1D Manual

Diagnostic Description
Adaptive Frequency Drive
Fault Relay Open
At Speed Input Opened
At Speed Input Shorted
Bearing Temp Sensor #1
Bearing Temp Sensor #2
Check Clock
Chilled Water Flow Lost
Chiller Mod Ref Voltage Calibration IFW
Chiller: Loss of Comm with TCI
Chiller: Loss of Comm with Local
CLD
Note: As implemented this is a
latching IFW diagnostic. That is, once
generated it cannot be regenerated
until a manual reset is done.
Chiller: Loss of Comm with Purge
Chiller: Loss of Comm with Rfgt
Monitor
Chiller: Loss of Comm with Starter MMR
Chiller: Loss of Comm with Stepper
#1
Chiller Mod Off-Brd 5V Range
Chlr Sat Cond Temp Sensor
(Purge)
As Sensed by the Purge module
in Retrofit applications)
98

Diagnostics Tables

Diag. Active
Diag Modes Cause
Type (Non-Active
Modes)
MMR Any Start The Adaptive Frequency Drive fault relay is Open
and Run
Mode
MMR All Running a. The At Speed input was found to be opened with the
Modes compressor motor running after successfully obtaining at speed
condition.
b.Applies only to Solid State Starters.
MMR Pre-Start a. Using either a Solid State Starter or an Adaptive Frequency
Drive, the Up to Speed/At Speed input was found to be shorted
before the compressor was started.
b. Applies only to Solid State Starters and Adaptive Frequency
Drives.
MMR All Open or Short, only if this option is enabled at the Clear
Language Display
MMR All Open or Short, only if this option is enabled at the Clear
Language Display
IFW All On loss of power the clock does not keep time if there is an
extended power loss (greater than 15 seconds). This diag. is
also generated to alert the operator to check the clock.
MAR All modes a. The chilled water flow switch input was open for more than
except 6-10 contiguous seconds.
STOP (00) b. 6-10 seconds of contiguous flow clears this diagnostic.
and
EXTERNAL
STOP (100)
All An improper reference voltage was detected at the Chiller
Module. A 2.5 vdc reference is used to calibrate the
non-ratiometric analog I/O such as 2-10 vdc and 420 ma inputs
as well as PWM Analog outputs. The micro checks to see that
the A/D value falls within an acceptable range.
IFW All The Tracer was setup as "Installed" at the CLD and the chiller
module lost communications with the TCI (comm 3 or comm4)
module for 15 contiguous seconds.
IFW- All The chiller module lost communications with the LCLD module
AR for 15 contiguous seconds.
IFW All The chiller module lost communications with the Purge module
for 15 contiguous seconds.
CTV All The chiller module lost communications with the Refrigerant
Monitor for 15 contiguous seconds.
All The chiller module lost communications with the Starter module
for 15 contiguous seconds.
MMR All The chiller module lost communications with the Stepper #1
module for 15 contiguous seconds.
IFW All An improper Off Board 5v voltage was detected at the Chiller
Module. A 5 vdc 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.
IFW All Open or Shorted Sensor
a. Applies to Retrofit applications of the Purge
Only. Does not apply to UCP2 applications.
b. IFW to the chiller, MMR to the Purge.
Help Message
See Adapt. Frequency
Drive Service Bulletin
Check End of Limt/At
Speed Input
Check End of Limt/At
Speed Input
Check Sensor, Wiring and
Connections
Check Sensor, Wiring and
Connections
Check Main Power Supply,
Reset Clock
Check Pump, Valves, Flow
Switch
Check Chiller Module
Voltages
Check IPC
Wiring/Connections
Check IPC
Wiring/Connections
Check IPC
Wiring/Connections
Check IPC
Wiring/Connections
Check IPC
Wiring/Connections
Check IPC
Wiring/Connections
Check Chiller Module
Voltages
Purge Inop: See Purge O
& M Manual
CVRC-M-1D