Chiller Troubleshooting; General Approach To Fault Isolation; Controller Diagnostic Codes - Trane Manhattan Gen II Installation, Operation And Maintenance Manual

Chiller Troubleshooting

General Approach to Fault
Isolation
Trane manufactures chillers with embedded fault
detection and diagnostics in each module's controller that
offers continuous dedicated monitoring to record and
report faults as they occur in real time allowing repairs to
be performed in a timely manner.
Various faults occurring in a building's HVAC system can
lead to unnecessary energy consumption and poor
thermal comfort for a building's occupants. Fault detection
and isolation plays a significant role in monitoring,
Table 11. Interface panel diagnostic code key
ALARM
BMS offline
Compressor 1/2 CoreSense Failure
Compressor 1/2 Failure
Compressor 1/2 Lockout
Compressor 1/2 Offline
Compressor 1/2 Warning
Condenser Flow Alarm
Condenser LWT too low
c.pCOe Offline Alarm
c.pCOe UI1 sensor failure
c.pCOe UI2 sensor failure
c.pCOe wrong config Alarm
Error in retain memory writings
Error in the number of retain memory writings User
Evaporator Flow Alarm
Evaporator Freezing Alarm
Evaporator LWT too high
HP Alarm
HP Switch Alarm
LP Alarm
LP Lockout Alarm
Client communication lost
Phase Monitor Alarm
Server 1/2/3/4/5/6/7/8/9 communication lost Auto
System Chilled LWT too high
System Hot LWT too low
UI1 sensor failure
UI2 sensor failure
UI3 sensor failure
UI4 sensor failure
58
maintaining, and repairing chillers to improve operator
safety and minimize operating costs.
Fault detection is recognizing that a problem has occurred,
even if the root cause is not yet known. Fault isolation is the
process of reducing potential causes to determine the
most likely source of chiller failure.

Controller Diagnostic Codes

The following table assists in explaining the alarm codes
that appear in the remote interface panel in the event of an
alarm. The alarm history is accessed by pressing the alarm
log key. See below table.
RESET
Auto Warning
Auto Shuts down compressor 1/2
Auto Shuts down compressor 1/2
Auto Shuts down Circuit 1/2
Auto Shuts down compressor 1/2
Auto Warning
User Shuts down Circuits / Circuit 1 in Constant Flow systems
Auto Warning
Auto Shuts down Circuit 2
Shuts down Circuit 2 if Low Pressure sensor selected for Suction Pressure
Auto
Alarm
Auto Shuts down Circuit 2
Auto Warning
User Warning
Warning
User Locks out module in Variable Flow systems
User Locks out module
Auto Warning
User Shuts down Circuit 1/2
User Shuts down Circuit 1/2
Auto Shuts down Circuit 1/2
User Shuts down Circuit 1/2
Auto Server modules switch into Stand-alone Mode
Auto Locks out module
Warning
Auto Warning
Auto Warning
Shuts down circuit 1 if Low Pressure sensor selected for Suction Pressure
Auto
Alarm
Auto Shuts down Circuit 1
Shuts down local cooling control if Module is in Stand-alone Mode and
Auto respective Entering / Leaving Water sensor selected for Temperature
Control
Auto Locks out module
ACTION
ARTC-SVX002A-EN