Starter Contactor Sequence - Trane CVHE Troubleshooting Manual

Key:
A. (Test for transition complete input open)
B. (Just delay time)
C. Close 1M (2K1) Contactor and test for no current.)
(Starter integrity test)
D.
E. (Open1M (2K1)
F. (Close Shorting Contactor (2K3) and test for no current,
then wait for Start command) (Starter integrity test)
G. (Close 1M (2K1)
H. (Wait 1.5 sec after phase currents drop to 85%)
J. (Close 2K4 Transition Contactor)
K. (Open S (Shorting) Contactor
L. (Close 2M (2K2) Contactor)
M. (Wait to look for Transition complete) N. (Filtering time
on Transition complete input)
N. (Filtering time on Transition complete input)
Note: The transition complete contact closure is expected to be an auxiliary
contact to the "Run Contactor' (2K2).
CVHE-SB-32A
Interval Units Actual
160 to 240 msec
20 msec
500 msec
1 sec
200 msec
1.0 sec (Min.)
sec 2sec
sec 1.5 sec
msec 100 msec
msec 260 msec
140 msec
msec 2.32 to 2.38sec
msec 160 to 240 sec
85