Trane CVRC-M-1D Manual page 99

Diagnostic Description
Cond Entering Wtr Temp Sensor
Cond Leaving Wtr Temp Sensor
Condenser Rfgt Pressure Sensor
Condenser Rfgt Temp Sensor
Condenser Water Flow Lost
Condenser Water Flow Overdue
Cprsr did not Accelerate Fully
Cprsr did not Accelerate:
Shutdown
Cprsr did not Accelerate:
Transition
(The Motor is put across the line)
Current Overload
Current Overload Setpts Error
CVRC-M-1D
Diagnostics Tables
Diag. Active
Diag Modes Cause
Type (Non-Active
Modes)
IFW All Open or Short
IFW All Open or Short.
MMR All Open or Short.
Must Hold on open AND short input is 2.0 Psia.
Design: Both opens and shorts result in the pressure going to
the low end of the scale. Therefore a Must Hold on the high
pressure end is not required.
MMR All Open or Short
MAR Start and All The condenser water flow switch input was open for more than
Run Modes 6-10 contiguous seconds.
MMR Estab. Cond Condenser water flow was not proven within 4.25 minutes of the
Water Flow condenser pump relay being energized.
MMR Starting a. Using either a Solid State Starter or an Adaptive Frequency
Drive, the UCM did not receive an Up to Speed or At Speed
Signal within the Maximum Acceleration Timer Setting.
MMR Start Mode a. The compressor did not come up to speed in the allotted time
defined by the Maximum Acceleration Timer.
b. The Clear Language Display setups defined "Shutdown" as
the action when the Maximum Acceleration Timer was
exceeded.
IFW Start Mode a. The compressor did not come up to speed in the allotted time
defined by the Maximum Acceleration Timer.
b. The Clear Language Display setups defined "Transition" as
the action when the Maximum Acceleration Timer was
exceeded.
MMR All Running Motor current exceeded overload time Vs trip characteristic.
Modes
IFW All The redundant overload settings did not agree for 30 contiguous
seconds. (Continue to use the previous value for the 30 second
timeout.) When this diagnostic occurs the affected Starter
Module shall use the minimum (00000 binary, 00 decimal)
overload setting as a default until either the UCM is reset or, if
the redundant settings agree again, the starter module can go
back to using the actual setting.
Help Message
Check Sensor, Wiring
and Connections
Check Sensor, Wiring
and Connections
Check Sensor, Wiring
and Connections
Check Sensor, Wiring
and Connections
Check Pumps, Valves
and Connections
Check Pumps, Valves
and Connections
Check End of Limt/At
Speed Input
Check Main Power
Supply and Wiring
See Troubleshooting
Service Bulletin
CVHE-SB-32
Check Main Power
Supply
& Wiring
Review Overload Set
Up
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