71
CDHF-SVU01C-EN
Current passing through circuit
breaker 1Q5 reaches 2 normally open
parallel sets of contacts: those of
refrigerant and oil pump relay (1A7-
J2-5 to 1), and the 2K11 interlocking
relay. Connected at module 1A7-J2-2
to 4.
Note: While the (1A7-J2-5 to 1) relay
automatically is closed by the main
processor 1A22 as a part of the start
sequence. It can also be closed
manually by changing the oil pump
status to “ON” in the manual over
ride mode menu of DynaView™.
Closure of the (1A7-J2-5 to 1), or 2K11
contacts also allows current to pass
through the coil of the refrigerant
pump starter relay (4K8), to the start
windings of the refrigerant pump.
When motor 4M3 first starts, current
draw is high: This causes current
sensing relay 4K8 to close its
normally open contacts and pull in of
pump Capacitor 4C1. Increasing
motor speed and related decreasing
current through the main winding
and relay coil reduce the magnetic
force and the armature “Drops out”
to open the start contacts and
disconnect the start windings and
capacitor. Current now flows only to
the Run windings of the oil pump
motor or refrigerant and oil pump
motor.
Control Sequence
of Operation
Maximum Acceleration
Timer Setting
by Starter Type
Wye-Delta 27 Seconds
Auto-Transformer 16
Primary Reactor 16
Across the Line 6
Solid State 15
AFD 30