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80 CVHE-CLD-1A
Starter Contactor Interrupt
Failure
MMR Starter Starter
Contact
not
Energize
d
(Starter
Contact
Energize
d)
a. Welded Starter contactor.
b. Detected a welded compressor contactor
when the compressor was commanded off but
the current did not go to zero. Detection time
shall be 5 second minimum and 10 seconds
maximum for all Electromechanical and Solid
State Starters. Detection time for Adaptive
Frequency. Drives shall be 12 seconds minimum
and 20 seconds maximum. On detection,
generate the diagnostic, energize the
appropriate alarm relay, continue to command
the affected compressor off.
Complete
Starter
Checkout
Required
Starter did not Transition MMR Starter On the
first
check
after
transition.
a. The UCM did not receive a transition complete
signal in the designated time from the UCM
command to transition. The must hold time from
the UCM transition command is 1 second. The
Must trip time from the transition command is 6
seconds. Actual design is 2.5 seconds.
b. Item a. above is active only for Y-Delta, Auto-
Transformer, and Primary Reactor, and X-Line
Starters.
Complete
Starter
Checkout
Required
Starter Dry Run Test MMR Starter 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
Starter Fault Type I MMR Starter Starting a. 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.
b. This test applies only to factory installed Y-
Delta Closed Transition Starters.
See
Troubleshooting
Service Bulletin
Starter Fault Type II MMR Starter Starting a. 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 CTs. If
current is detected when only S is energized at
Start, then 1M is shorted.
b. This test in a. above applies to all forms of
starters (Note: It is understood that many
starters do not connect to the Shorting
Contactor.).
See
Troubleshooting
Service Bulletin
Starter Fault Type III MMR Starter Starting a. 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.
b. This test in a. above applies to all forms of
starters except Adaptive Frequency. Drives
(Note: It is understood that many starters do not
connect to the Shorting Contactor.).
c. For Adaptive Frequency Drives, TBD
See
Troubleshooting
Service Bulletin
Starter: Loss of Comm with
Circuit
MMR Starter All The starter module lost communications with the
Circuit module for 15 contiguous seconds.
Check IPC
Wiring/
Connections
DIAGNOSTIC DESCRIPTION
Diag
Type
Module
that
Called
Diag.
Diag.
Active
Modes
CAUSE Help Message
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