York YLAA0041 Installation Operation & Maintenance page 165

Form 150.72-ICOM6
Issue date: 12/19/2023
Option 11: Power fail restart
P O W E R F A I L
A U T O M A T I C
Chiller auto restarts after a power failure.
P O W E R F A I L
M A N U A L
After a power failure, the UNIT switch must be tog-
gled before restart at the unit is allowed. NORMALLY
MANUAL RESTART should NOT BE SELECTED.
Option 12: Soft start enable/disable
S O F T
D I S A B L E D
SOFT START "DISABLED" MUST be selected on all
chillers.
This message may not be viewable on non-European
chillers.
Option 13: Unit type
U N I T
L I Q U I D
The UNIT TYPE message cannot be modified under
the unit keys.
"Liquid CHILLER" must be displayed, or
damage to compressors or other compo-
nents will occur if operated in the HEAT
PUMP or CONDENSING UNIT modes.
If unit type needs to be changed to make the unit a
liquid chiller, remove power and then remove the
jumper between J11-7 and J11-12 on the I/O Board.
Reapply power to the micro panel and the micropro-
cessor will store the change.
Johnson Controls
R E S T A R T
R E S T A R T
S T A R T
T Y P E
C H I L L E R
Option 14: Refrigerant type
R E F R I G E R A N T
R – 4 1 0 A
Refrigerant type R-410A must be selected under Ser-
vice Mode. Refrigerant type is displayed under the
OPTIONS key, but is only programmable in Service
Mode.
Incorrect programming may cause dam-
age to compressors.
Option 15: Expansion valve type
E X P A N S I O N
T H E R M O S T A T I C
Expansion valve type, thermostatic or electronic
may be selected under Service Mode. Expansion valve
type is displayed under the OPTIONS key, but is only
programmable in Service Mode. YLAA chillers will
typically always be equipped with thermostatic expan-
sion valves.
Incorrect programming may cause dam-
age to compressors.
Also see the UNIT KEYS PROGRAMMING QUICK
REFERENCE LIST in Figure 46 on page 169.
Option 16: Flash card update
F L A S H C A R D
D I S A B L E D
A Flash Card is used to input the operating program
into the chiller IPU. A Flash Card is used instead of an
EPROM. Normally, a Flash Card update is not required
and the message above will be displayed.
Section 7: Unit controls
T Y P E
V A L V E T Y P E
U P D A T E
165
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