York YLUA0248 Series, Installation Operation & Maintenance

Page: 118 / 158

JOHNSON CONTROLS
118
FORM 150.73-NM2
ISSUE DATE: 09/07/2020
SECTION 7 – UNIT CONTROLS
UNIT KEYS
00070VIP
OPTIONS
CLOCK
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. Table 17 shows the pro-
grammable options. Following are the displays in the
order they appear:
Option 1 – Language
D I S P L A Y L A N G U A G E
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 O N
S Y S 2 S W I T C H O N
This allows both systems to run
or
S Y S 1 S W I T C H O N
S Y S 2 S W I T C H O F F
This turns system 2 off
S Y S 1 S W I T C H O F F
S Y S 2 S W I T C H O N
This turns system 1 off
or
S Y S 1 S W I T C H O F F
S Y S 2 S W I T C H O F F
This turns systems 1 & 2 off
Turning a system off with its system
switch allows a pumpdown to be per-
formed prior to shutdown.
Option 3 – Ambient Control Type
A M B I E N T C O N T R O L
S T A N D A R D
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 C O N T R O L
L O
W A M B I E N T
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.
The software may skip the low ambient
selection, but a low ambient kit is still
needed to operate below 25 ° F.