Manual 2100-719
Page
17 of 25
120*
SW
1
SW
2 TIME (SEC)
OFF
OFF
ON
ON
OFF
ON
OFF
ON
30
60
180
MIS-2668 A
OFF
LOW PRESSURE BYPASS TIMER SWITCH
*(FACTORY SETTING 120 SECONDS)
ACCUMULATED DEFROST TIME TIMER
(FACTORY SETTING 60 MIN.)
ON
FIGURE 8
DEFROST CONTROL BOARD
Low Pressure Switch Bypass Operation
- The control has a
selectable (SW1) low pressure switch bypass set up to ignore
the low pressure switch input during the first (30, 60, 120 or
180 seconds) of “Y” operation.
After this period expires, the control will then monitor the low
pressure switch input normally to make sure that the switch is
closed during “Y” operation.
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 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 certainly wrong and it will not restart itself.
