Defrost Control Board - Bard Q-TEC Q30H2-A Installation Instructions Manual

High Pressure Switch Operation – The control has a
built-in lockout system that allows the unit to have the
high pressure switch trip up to two times in one hour and
only encounter a "soft" lockout. A "soft" lockout shuts
the compressor off and waits for the pressure switch to
LOW PRESSURE BYPASS TIMER SWITCH
(FACTORY SETTING 120 SECONDS)
reset, which at that point then allows the compressor to
be restarted as long as the 5-minute short cycle timer has
run out. If the high pressure switch trips a third time
within one hour, the unit is in "hard" lockout indicating
something is wrong and it will not restart itself.
Figure 24

Defrost Control Board

ACCUMULATED RUN TIME SELECTOR
(FACTORY SETTING 30 MIN.)
SW SW
1 2 TIME (SEC)
OFF OFF 30
ON OFF 60
OFF ON 120*
ON ON 180
OFF
ON
MIS-2684 A
Manual 2100-601E
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