York YCAS0130, Installation, Operation & Maintenance Manual, Page: 179 / 204

179
YORK INTERNATIONAL
FORM 201.19-NM1 (204)
8.9 SERVICE MODE: UNIT SETUP
The Service Mode allows programming unit set-up
values. These values are programmed before the
chiller leaves the factory and typically should never
be changed.
Catastrophic failure of chiller compo-
nents can occur if the set-up values are
improperly programmed. If for some
reason these values need to be checked
or changed, care should be exercised.
Whenever an EPROM is changed, the
programmed values should be record-
ed prior to removing the old EPROM.
These values should then be checked
and programmed into the micro when
the new EPROM is installed.
Setup values may be checked in the Service Mode by
pressing the PROGRAM, 5144, and ENTER keys.
Table 5 lists the value and the program range that will
be accepted.
SETUP MODE VALUE PROGRAMMABLE RANGE
Refrigerant Type R-22 or R-407C
R-407C Chiller Type Optimized or Drop-in
Unit Type
YCAS or YCWS
**
Heat Recovery Unit
Enabled or Disabled
***
Sys 1 100% Full Load Amps
75 to 500 Amps
*
Sys 2 100% Full Load Amps
75 to 500 Amps
*
Sys 1 Motor Protector Input 1.0 to 5.0 volts
*
Sys 2 Motor Protector Input 1.0 to 5.0 volts
*
Oil Cooling On 167 to 203 ºF
180 ºF default
****
Oil Cooling Diff 9 to 18 ºF
9 ºF default
****
Discharge Cooling On 176.0 to 239.0 ºF
212.0 ºF default
Discharge Cooling Diff 7.2 to 27.0 ºF
18 ºF default
Data Logging Mode OFF or ON
Data Logging Timer 6 to 60 seconds
Sys 1 Operating Hours 0 to 99,999
Sys 2 Operating Hours 0 to 99,999
Sys 1 Starts 0 to 99,999
Sys 2 Starts 0 to 99,999
Clear History Buffer YES or NO
NOTE:
* See Table 6 or 7 for programming system 100% Full
Load Amps and System Motor Protector input volt-
age. Also assure that the correct number of wires
per phase pass through each C.T. The C.T. is built
internally into the 2ACE motor protector.
** The chiller must always be programmed for YCAS
*** Heat recovery must always be disabled.
**** Oil and discharge cooling is only utilized on spe-
cial low temp chiller.
TABLE 5 – SERVICE MODE
PROGRAMMABLE VALUES