Frymaster BIH52 - Manual (Page 42)

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Improper temperature control problems can be categorized into melt cycle problems and failure to
control at setpoint problems.
MELT CYCLE PROBLEMS
The melt cycle is automatically initiated by the controller (Analog, M100B, or M2000) when the
controller is first turned on. The unit should remain in the melt cycle until the oil in the frypot
reaches 180ºF (82ºC). (Do not confuse the melt cycle with the LOW TEMP warning. This warning will
be displayed when the M100B or M2000 computer senses that the oil in the frypot is more than 45ºF
(25ºC) below the setpoint.)
Problems may be with the controller itself, the temperature probe, or a malfunctioning heat relay on
the interface board.
FAILURE TO CONTROL AT SETPOINT
Problems in this category may be with the temperature probe, the interface board, or the controller.
3.7.4 Recovery Time or “Rate Of Rise” and the M100B “Rec Lock” Condition
Recovery time or “rate of rise” is a method of measuring a fryer’s performance. Put simply, it is the
time required for the cooking oil temperature to rise from 270ºF to 320ºF (133ºC to 160ºC). This
range is used as a standard since ambient kitchen temperatures can effect the test if lower ranges are
used.
The M100B computer performs the recovery test when the fryer is first turned on and anytime there-
after when the temperature of the oil drops below 250ºF (121ºC), such as when cold cooking oil is
added to the frypot. If the fryer takes longer than 2 minutes and 35 seconds to recover, the display
will show REC LOCK and the computer will lock out.
The currently recorded recovery time can be viewed anytime the temperature of the cooking oil is
above 270ºF (133ºC) by pressing the recovery time recall switch .
If REC LOCK occurs three or more times within a week, verify that oil is not being added when the
fryer is heating (that is, while a heat mode indicator is illuminated). If oil is not being added while
the fryer is heating, there is a problem with the fryer.
To clear the REC LOCK condition, turn the computer off by pressing the right
switch. Enter the
programming mode by pressing and releasing the left 1 , 2 , and switches simultaneously. The
computer will display its model number and then FR FRIES YES. Press the switch. The computer
will display LOCK CLEARED.
3.7.5 Filtration Problems
BIH52 units are equipped with FootPrint III built-in filtration systems. The majority of filtration
problems arise from operator error. One of the most common errors is placing the filter paper on the
bottom of the filter pan rather than over the filter screen.