McDonald's C602, Manual

Page: 78 / 114

76
Hard Lock— There are two causes of a hard lock failure:
1. The brush-clean timer has elapsed (maximum setting
of 14 days). (See Figure-179.)
Figure-179
Selecting the Wash symbol will display the
following screen: (See Figure-180.)
Figure-180
2. There has been a thermistor failure (freezing
cylinder, hopper, or glycol) during the Heat Treatment
process. (See Figure-181.)
Figure-181
Selecting the Calibrate symbol will indicate which
thermistor caused the hard lock. (See Figure-182.)
Figure-182
If the machine has hard locked and an attempt is made to
enter Auto, the machine will enter the Standby mode and
display the following message (see Figure-183):
Figure-183
To restore the message that identified the reason for the
hard lock, turn the power switch OFF for 5 seconds and
then return the power switch to the ON position. The
original message with the reason for the hard lock will be
displayed. The Fault Description can also be found in the
Manager's Menu (See page 85).
The FREEZER LOCKED message will remain on the
display until the brush-clean requirements are fulfilled.
The freezer must be disassembled in order to activate
the 5-minute timer on the display screen. Once the timer
counts down to zero, the lockout is cleared.
Soft Lock: If a Heat Treatment cycle has not been
initiated within the last 24 hours, a soft lock failure will
occur. A soft lock allows the operator to correct the cause
of the soft lock. The operator has the option of either
starting another Heat cycle or brush-cleaning the
machine.
When a soft lock occurs, the machine will go into the
Standby mode. The following message is displayed on
the screen. The reason for the soft lock is indicated on
the second line (see Figure-184.)
Figure-184
If the reason for the soft lock has been corrected,
selecting the Heat symbol initiates a Heat cycle
immediately. Selecting the Wash symbol when the
above message is displayed will hard lock the machine,
and brush-cleaning will be necessary.
The following are the various messages for soft lock
failures that appear on the second line of the screen:
POWER SWITCH OFF Power switch was in the OFF
position.
MIX OUT PRESENT There was a Mix Out
condition present.
AUTO OR STANDBY
OFF The machine was not in the
Auto or Standby mode.
NO HEAT CYCLE TRIED A Heat Treatment cycle was
not attempted in the last 24
hours. (AUTO HEAT TIME
was advanced,a power loss
was experienced at the time
the cycle was to occur, or
there was a Heat cycle
failure not due to a thermistor
failure.)