Carrier C708, Service Manual

Page: 25 / 148

19
Models C708/C709/C716/C717
Controls, Systems and Operations
Lockout Data
Lockout data is protected separately from the rest of
the data in the memory. While the Lockout Data is
being checked, the following screen is displayed.
Initializing
Lockout Data
If Lockout Data is corrupted, all lockout history data
is cleared. A “LOCKOUT CRC ERR” fault is
displayed.
After the memory integrity has been tested, the
Safety Timeout screen will be displayed.
Heat Cycle Data
Heat cycle data is checked separately from the rest
of the data in memory. Each individual Heat Cycle
Data record is monitored for corruption individually.
At the start of a heat cycle, the next Heat Cycle data
record is cleared and data for the heat cycle is
written to it. The current Heat Cycle Data is
displayed as the first heat cycle record in the HEAT
CYCLE DATA menu option.
The heat cycle data records are checked for integrity
when the record is accessed, presently only through
the HEAT CYCLE DATA menu option.
(For
additional Heat Cycle Data information,
see page 26.)
Once the system has initialized, the number of days
until brush cleaning is required is indicated on the
control panel. The SAFETY TIMEOUT screen will
be displayed with the alarm on for 60 seconds or
until any control symbol is touched.
SAFETY TIMEOUT
ANY KEY ABORTS
Power Switch OFF
After the safety timeout has been completed and the
power switch is OFF, the following screen is
displayed.
POWER SWITCH OFF
-- = -- = -- = -- = -- = --
UNIT CLEANED
Power Switch ON
When the power switch is placed in the ON position,
the control panel touch keys become operative. The
fluorescent display will be either blank or indicate
that the unit has been cleaned.
UNIT CLEANED