Unit Keys - York YLUA0078 Installation Operation & Maintenance

SECTION 7 – UNIT CONTROLS
Options Key
There are many user programmable options under the
OPTIONS key. The OPTIONS key is used to scroll
through the list of options by repeatedly pressing the
OPTIONS key. After the selected option has been dis-
played, the ↑ (UP) and ↓ (DOWN) arrow keys are then
used to change that particular option. After the option
is changed, the ENTER/ADV key must be pressed to
enter the data into memory. Figure 22 on page 129
shows the programmable options. Following are the
displays in the order they appear:
Option 1 – Language
D I S P L A Y
E N G L I S H
English, Spanish, French, German, and Italian can be
programmed.
Option 2 – System Switches
(two system units only)
(Single System Display is similar)
S Y S 1 S W I T C H
S Y S 2 S W I T C H
This allows both systems to run
S Y S 1 S W I T C H
S Y S 2 S W I T C H
This turns system 2 off
124

UNIT KEYS

L A N G U A G E
O N
O N
or
O N
O F F
OPTIONS
CLOCK
S Y S
S Y S
This turns system 1 off
S Y S
S Y S
This turns systems 1 and 2 off
Turning a system off with its system switch
allows a pumpdown to be performed prior
to shutdown.
Option 3 – Ambient Control Type
A M B I E N T
The low ambient cutout is adjustable from 25°F to 60°F
(-3.9°C to 15.6°C).
or
A M B I E N T
L O W
The low ambient cutout is programmable down to 0°F
(-17.8°C). A low ambient kit MUST be installed for
this option to be chosen. If the kit is NOT installed,
and low ambient is selected, low pressure faults and
compressor damage may occur.
FORM 150.73-NM1
ISSUE DATE: 09/04/2020
1 S W I T C H O F F
2 S W I T C H O N
or
1 S W I T C H O F F
2 S W I T C H O F F
C O N T R O L
S T A N D A R D
C O N T R O L
A M B I E N T
JOHNSON CONTROLS
00070VIP