Trane RTHD

RTHD-SVX01D-EN 155
Diagnostics
E4 Phase Loss Immediate Latch a) No current was sensed on one or two of the
current transformer inputs while running or starting
(See Nonlatching 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
trippoint 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
xformer inputs. Logic will detect and trip in a
maximum of 0.3 second from compressor start.
Local
E5 or E5 Phase Reversal Immediate Latch A phase reversal was detected on the incoming
current. On a compressor startup the phase reversal
logic must detect and trip in a maximum of 0.3
second from compressor start.
Local
E3 Phase Unbalanc-
eSevere Current
Imbalance
Normal Latch A 30% Phase cCurrent Unbalance imbalance has
been detected on one phase relative to the average
of all 3 phases for 90 continuous seconds.
Local
1A0 Power Loss Immediate NonLatch The compressor had previously established currents
while running and then all three phases of current
were lost. Design: Less than 10% RLA, trip in 2.64
seconds. This diagnostic will preclude the Phase
Loss Diagnostic and the Transition Complete Input
Opened Diagnostic from being called out. To
prevent this diagnostic from occurring with the
intended disconnect of main power, the minimum
time to trip must be greater than the guaranteed
reset time of the Starter module. Note: This
diagnostic prevents nuisance latching diagnostics
due to a momentary power loss - It does not protect
motor/compressor from uncontrolled power reappli-
cation. See Momentary Power Loss Diagnostic for
this protection. This diagnostic will auto reset in 10
seconds from its occurrence, and is not active during
the start mode before the transition complete input
is proven. This prevents the chiller from cycling due
to some internal starter problem, as the starter
would latch out on either a "Starter Fault Type 3" or a
"Starter Did Not Transition" latching diagnostic.
However true power loss occurring during a start
would result in a misdiagnosis and the chiller would
not automatically recover.
Remote
2F2 Refrigerant
Monitor Sensor
Info NonLatch Open or Shorted input and the Rfgt Monitor is setup
as installed
Remote
28C Restart Inhibit
Warning
Info NonLatch The Restart Inhibit was invoked on a compressor.
This indicates excessive chiller cycling which should
be corrected.
Remote
189 Solid State Starter
Fault
Immediate Latch The Solid State Starter Fault Relay is open Local
Table 33 Diagnostic List
Hex
Code
Diagnostic
Name and
Source Severity Persistence Criteria
Reset
Level