Trane CVHG Information Manual

Diagnostics Menu
68 CVHE-CLD-1A
Condenser Rfgt Pressure
Sensor
MMR Circuit 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.
Check Sensor,
Wiring And
Connections
Condenser Rfgt Temp Sensor MMR Stepper All Open or Short Check Sensor,
Wiring And
Connections
Condenser Water Flow Lost MAR Chiller Chilled
Water
Control:
Start and
All Run
Modes.
Hot
Water
Control:
(All Stop
modes)
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.
c. Even though the pump times out in the STOP
modes, this diagnostic shall not be called out in
the STOP modes.
Check Pumps,
Valves, Flow
Switch
Condenser Water Flow Overdue MAR Chiller Estab.
Cond
Water
Flow
Condenser water flow was not proven within
4.25 minutes of the condenser pump relay being
energized.
Check Pump,
Valves, Flow
Switch
Condenser Water Pressure
Sensor
IFW Chiller All Open or Short and the Cond Water Pressure
Sensor is setup as installed at the Clear
Language Display.
Check Sensor,
Wiring, and
Connections
Cprsr did not Accelerate:
Shutdown
MMR Starter Start
Mode
a. The compressor did not come up to speed in
the allotted time defined by the Maximum
Acceleration Timer.
b. The Human Interface setups defined
“Shutdown” as the action when the Maximum
Acceleration Timer was exceeded.
Check Main
Power Supply &
Wiring
Cprsr did not Accelerate Fully MMR Starter 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.
b. Applies only to Solid State Starters and
Adaptive Frequency. Drives.
Check End of
Limt/At Speed
Input
Cprsr Did Not Accelerate:
Transition
(The Motor is put across the
line.)
IFW Starter Start
Mode
a. The compressor did not come up to speed in
the allotted time defined by the Maximum
Acceleration Timer.
b. The Human Interface setups defined
“Transition” as the action when the Maximum
Acceleration Timer was exceeded.
See
Troubleshooting
Service Bulletin
Current Overload MMR Starter All
Running
Modes
Motor current exceeded overload time vs. trip
characteristic.
Check Main
Power Supply &
Wiring
Current Overload Setpts Error IFW Starter All a. 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.
Review
Overload Set Up
DIAGNOSTIC DESCRIPTION
Diag
Type
Module
that
Called
Diag.
Diag.
Active
Modes
CAUSE Help Message

Trane CVHG Specifications

General

Brand	Trane
Model	CVHG
Category	Chiller
Language	English