York YLAA0041 Installation Operation & Maintenance page 166

Section 7: Unit controls
If the operating software is to be updated, insert the
Flash Card into the Flash Card input port. Turn off the
unit switch and set the FLASH CARD UPDATE TO
"ENABLED" using the ↑ and ↓ keys.
F L A S H C A R D
E N A B L E D
Press the ENTER key and the following message will
be displayed until the update has been completed. The
keypad and display will not respond during the update.
DO NOT reset or power down the chiller until the up-
date is completed.
F L A S H C A R D
P L E A S E W A I T . . .
After the update is completed, an automatic reboot will
occur. If an error occurred, the following message will
appear with the error code and no reboot will occur.
F L A S H C A R D
E R R O R
If the update resulted in an error, the original program
will still be active. When an error occurs, ensure the
correct Flash Card was used. Incorrect chiller software
will cause an error. If this is not the case, the Flash
Card is most likely defective or the IPU and I/O combo
board is bad.
Option 17: Remote temperature reset
R E M O T E T E M P
I N P U T
Remote Temp Reset input selection is programmable
according to the type of input used. The following op-
tions are available:
• DISABLED (default)
• 0.0 – 10.0 (DC)
• 2.0 – 10.0 V (DC)
• 0.0 – 20.0 mA
• 4.0 – 20.0 mA
166
U P D A T E
U P D A T I N G
U P D A T E
XXXXX
R E S E T
XXXXXXXXXXXXXX
The options display message for Remote
Temp Reset Input only appears if the
Temp Reset Option is enabled under Ser-
vice Mode. The option must be enabled
under the Service Mode for the Remote
Temperature Reset to operate.
Option 18: Pump control
Pump Control is used to operate the optional onboard
pump kit or to control an external pump through dry
contacts 23 and 24 on Terminal Block XTBC2. To use
this option, the following selection should be made in
the Service Mode:
Y O R K
K I T P U M P S
When YORK HYDRO KIT PUMPS = 1, the controls
will be closed to run the pumps whenever any one of
the following conditions are true:
• Low Leaving Chilled Liquid Fault
• Any compressor is running
• Daily Schedule is ON and Remote Stop is closed.
• Ambient air temperature <400F (4.40C) and leav-
ing chilled liquid temperature <440F (6.70C)
Even if one of the above conditions are
true, the pump will not run if the chiller
has been powered up for less than 30 sec-
onds; or if the pump has run in the last
30 seconds to prevent pump overheating.
E X T E R N A L
E V A P
EXTERNAL EVAP PUMP should be selected if an ex-
ternal pump is being controlled with the chiller pump
contacts. The operation will be the same as YORK
HDRO KIT PUMPS = 1
Y O R K
K I T P U M P S
Form 150.72-ICOM6
Issue date: 12/19/2023
H Y D R O
= 1
P U M P
H Y D R O
= 2
Johnson Controls