Starter Diagnostics - Trane Ascend ACR C Series Installation, Operation And Maintenance Manual

Table 29. Diagnostics — AFD (continued)
Diagnostic
Affects
Name and
Target
Source
AFD Over
Cprsr
Temperature - xA
AFD Short Circuit -
Cprsr
xA
(a) Latch (Trip Lock) - Requires reset command from the unit controller (via Modbus communication) or from TR200 keypad and power cycle of the drive to reset alarm.
Momentary NonLatch - Drive is programmed to automatically reset the alarm. If drive automatic reset sequence is exhausted, alarm will latch, requiring a manual reset.
NonLatch - True non-latching diagnostic where reset is not required to clear the alarm.
(b) AFD General Fault - xA intentionally has the Controller Persistance set to NonLatch since this catch-all group that can have both latching and non-latching TR200 alarms.
The diagnostic will not be latched by the UC, but instead follow the AFD. AFD will protect itself and the compressor and will require a manual reset if needed.
(c) AFD General Fault - xA Reset Level is set to Local, and Persistance is set to NonLatch to emphasize recommended user attention when an unexpected AFD alarm occurs.

Starter Diagnostics

Table 30. Diagnostics — Starter
Diagnostic
Affects
Name and
Target
Source
Motor Current
Circuit
Overload - xB
Over Voltage
Chiller
Phase Loss - xy Cprsr
Phase Reversal -
Cprsr
xy
AC-SVX003A-EN
Persistence
Severity
Controller
Immediate NonLatch
Latch (Trip Lock)
Immediate Latch
Active Modes
Severity
Persistence
Cprsr Energized
Immediate Latch
Normal NonLatch
Immediate Latch
and Run modes
Immediate Latch
[All Other Times]
Active Modes
[Inactive
AFD (a) Modes]
Momentary
Running
NonLatch
All
[Inactive
Modes]
Compressor current exceeded overload time vs. trip
characteristic. Must trip = 140% RLA, Must hold=125%,
nominal trip 132.5% in 30 seconds
Pre-Start and
Nom. trip: 60 seconds at greater than 112.5%, +/- 2.5%,
Any Ckt(s)
Auto Reset at 110% or less for 10 continuous seconds.
Energized
a) No current was sensed on one or two of the current
transformer inputs while running or starting (See Non-
latching Power Loss Diagnostic for all three phases lost
while running). Must hold = 20% RLA. Must trip = 5% RLA.
Time to trip shall be longer than guaranteed reset on Starter
Module at a minimum, 3 seconds maximum. Actual design
Start Sequence
trip point is 10%. The actual design trip time is 2.64
seconds.
b) If Phase reversal protection is enabled and current is not
sensed on one or more current transformer inputs. Logic
will detect and trip in a maximum of 0.3 seconds from
compressor start.
Compressor
energized to A phase reversal was detected on the incoming current. On
transition a compressor startup, the phase reversal logic must detect
command and trip in a maximum of .3 second from compressor start.
Diagnostics
Criteria
TR200 Alarm Code (A10), Alarm Word:
1, Bit: 8, Dec: 256
According to the electronic thermal
protection (ETR), the motor is too hot. The
fault is that the motor is overloaded by
more than 100% for too long.
TR200 Alarm Code (A16), Alarm Word:
1, Bit: 12, Dec: 4096
There is short-circuiting in the motor or on
the motor terminals.
Criteria
Reset
Level
Remote
Local
Reset
Level
Local
Remote
Local
Local
101