Henny Penny KFC Velocity Series Service Manual page 73

C C h h a a p p t t e e r r 4 4 S S o o f f t t w w a a r r e e U U p p d d a a t t e e s s
Watch a short video explaining software updates.
T T R R A A I I N N I I N N G G :
Periodically the software is updated with enhancements, menu changes or must be
reloaded such as when a control board is replaced or updated with a newer model
control. Use the following procedures to reload the software.
4 4 . . 1 1 S S o o f f t t w w a a r r e e F F e e a a t t u u r r e e s s
4 4 . . 1 1 . . 1 1 W W a a t t e e r r D D e e t t e e c c t t i i o o n n S S o o f f t t w w a a r r e e
The purpose of the water detection software is to prevent a frypot filled with water
from boiling or pressurizing. The software works by preventing the fryer from leaving
the melt cycle and entering a cook cycle, until the oil reaches 215°F. When the frypot
is turned on, the software measures the temperature of the liquid in the frypot. If the
temperature of the liquid in the frypot is below 215°F, the fryer enters the melt cycle.
During the melt cycle, the solenoid remains open and does not allow the frypot to
pressurize.
The melt cycle heats the liquid using a pulse rate that prevents water from boiling. If
the liquid temperature in the frypot is below 200°F, then the fryer heats with an 18/40
pulse rate (18 seconds on, 22 seconds off) for electric units and 25/40 (25 seconds
on, 15 seconds off) for gas units. Once the liquid temperature reaches 200°F, the
pulse rate is reduced to 5/40 (5 seconds on, 35 seconds off) for electric units and to 8/
40 (8 seconds on, 32 seconds off) for gas units. These reduced pulse rates provide
insufficient energy to allow water to reach a boiling point of 212°F in the frypot, but will
allow oil to reach 215°F. Once the liquid reaches 215°F the software allows the fryer
to enter the cook cycle, and the vat to pressurize.
4 4 . . 2 2 S S o o f f t t w w a a r r e e U U p p d d a a t t e e s s
4 4 . . 2 2 . . 1 1 C C o o n n t t r r o o l l B B o o a a r r d d U U p p d d a a t t e e s s
The control board is operated by an onboard Micro SD card, which is loaded with HP
software during the factory programming process and/or installation; it occasionally
requires an update. The software on a control board must be loaded from a USB
drive. The file type used for loading software is an .hpf (Henny Penny Flash) file. All .
hpf files are encrypted and are checksum protected, in order to prevent accidental or
malicious changes to the official HP software. In addition, the boot-loader program on
the control board allows selection of only the .hpf files that are designed for that
specific unit's control assembly. This prevents accidental loading of say a holding
cabinet in to a pressure fryer control, or similar mistake.
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