Trane RTHC - Page 108

Diagnostic Table
102 RTHC-SVD01B-EN
Starter did not
Transition
MMR
immediate
Starter
1U2
On the first
check after
transition.
During start -the Starter module did not
receive a transition complete signal in the
designated time from the command to
transition. The must hold time from the
transition command is 1 second. The Must
trip time from the transition command is 6
seconds.
Prior to start - Transition complete input
shorted.
Y- delta starters only
Complete starter
checkout required.
Starter Dry
Run Test
MMR
immediate
Starter
1U2
Starter Dry
Run Mode
While in the Starter Dry Run Mode either 50
% Line Voltage was sensed at the Potential
Transformers or 10 % RLA Current was
sensed at the Current Transformers.
Current or Voltage
Detected. Complete
starter checkout
required.
Starter Fault
Type I
MMR
immediate
Starter
1U2
Starting This is a specific starter test where 1M
(2K1) is closed first and a check is made to
ensure that there are no currents detected
by the CT's. If currents are detected when
only 1M is closed first at start, then one of
the other contactors is shorted.
Complete starter
checkout required.
Starter Fault
Type II
MMR
immediate
Starter
1U2
Starting This is a specific starter test where the
Shorting Contactor (S)(2K3) is individually
energized and a check is made to ensure
that there are no currents detected by the
CT's. If current is detected when only S is
energized at Start, then 1M is shorted.
Complete starter
checkout required.
Starter Fault
Type III
MMR
immediate
Starter
1U2
Starting As part of the normal start sequence to
apply power to the compressor the Shorting
Contactor (S) and then the Main Contactor
(1M) were energized. 1.6 seconds later
there were no currents detected by the
CT's for the last 1.2 Seconds on all three
phases.
Complete starter
checkout required.
Starter Mod
Ref Voltage
Calibration
IFW
n/a
Starter
1U2
all An improper reference voltage was
detected at the Starter Module. A 2.5 vdc
reference is used to calibrate the non-
ratiometric analog I/O such as 2-10vdc and
4-20ma inputs as well as PWM Analog
outputs. The micro checks to see that the
A/D value falls within an acceptable range.
This diagnostic is not supported.
Table 14-2: Diagnostic Table
Diagnostic
Description
Type/
Shutdown
Action
Module
Calling
Out Diag.
Operating
Modes
Diagnostic is
Active
Cause Help Message