© Copyright 2018 CGC Group Inc.
Installation Operation Maintenance Manual is Subject to Change without Notice- Last Revised June 2018
12
BULLDOG SideWinder – Installation, Operation, and Maintenance Manual
COOL OPERATION
1. Monitoring of the refrigerant cycle continues during operation of the compressor. The
following malfunctions will cause the compressor to shutdown:
a. If the head pressure exceeds the set point of the high pressure switch, the switch
will open and the control board will terminate the compressor operation within
10 seconds. At this time a flash code of 6 will be initiated on the red diagnostic
LED 15. Compressor operation will be restored in accordance with the
“Intelligent reset” algorithm.
b. If the suction pressure drops below the set point of the low pressure switch, the
switch will open and if it remains open beyond the 1 minute ignore period after
start up, compressor operation will be terminated within 10 seconds.
Compressor operation will be restored in accordance with the “Intelligent Reset”
algorithm. A flash code of 5 on the red diagnostic LED will be initiated at this
time.
c. Intelligent Reset Algorithm – If a low or high pressure switch opens and remains
open for more than 10 minutes, a hard lockout will be initiated and the cooling
mode will be locked off until the controls are manually reset. At the same time
the fault relay K3 will be set to alarm; however, if the open switch closes within
10 minutes a restart cycle is initiated. The restart cycle begins with a 10 minute
delay after which if there is a cool call in place and all other enablers are within
the start parameters, the compressor will again be put into operation. Should
either of the pressure switches open again, the shutdown procedure will cycle
again, followed by a restart. The intelligent reset will allow two open switch
shutdowns and restarts in a 24 hour period. If a third shutdown occurs within
24 hours this will put the refrigeration system into a full and hard lockout,
requiring a power down to reset. If two or less switch open shutdowns occur
within a 24 hour period, they will be erased from memory and will not
contribute to a future hard lockout. (A hard lockout will prevent compressor
operation until the controls are powered down for at least 20 seconds, and the
green power light goes out. A soft lockout is a compressor shutdown that will
be restored once the condition causing the shutdown returns to normal.)
d. During compressor operation, refrigerant temperature, system fluid temperature
and discharge air temperature are continuously monitored. If the refrigerant
temperature drops below 40
°
F, compressor operation will be disabled. After 10
minutes an auto reset occurs and the compressor will be enabled as soon as the
temperature rises above 65
°
F. Actual compressor restart will be delayed a
minimum of 5 minutes by the anti-recycle timer. A flash code
of 2 will be initiated upon a low refrigerant temperature shutdown.
