York YLUA0248 Series, Installation Operation & Maintenance

Page: 121 / 158

JOHNSON CONTROLS
121
SECTION 7 – UNIT CONTROLS
FORM 150.73-NM2
ISSUE DATE: 09/07/2020
7
Option 15 – Expansion Valve Type
E X P A N S I O N V A L V E T Y P E
T H E R M O S T A T I C
Expansion valve type must be thermostatic. or electronic
may be selected under Service Mode. Expansion valve
type is displayed under the Options key, but is pro-
grammable in Service Mode.
Incorrect programming may cause
damage to compressors.
Option 16 – Flash Card Update
F L A S H C A R D U P D A T E
D I S A B L E D
A Flash Card is used to input the operating program
into the unit IPU. A Flash Card is used instead of an
EPROM. Normally, a Flash Card update is not re-
quired and the message above will be displayed.
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 U P D A T E
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 unit until the update
is completed.
F L A S H C A R D U P D A T I N G
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 U P D A T E
E R
R O R XXXXX
If theupdate resulted in an error, the original program
will still be active. When an error occurs, assure the
correct Flash Card was utilized. Incorrect unit soft-
ware 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 R E S E T
I
N P U T XXXXXXXXXXXXXX
Remote Temp Reset input selection is programmable
according to the type of input utilized. The following
options are available:
• DISABLED (default)
• 0.0 – 10.0V (DC)
• 2.0 – 10.0V (DC)
• 0.0 – 20.0 mA
• 4.0 – 20.0 mA
The options display message for Re-
mote Temp Reset Input only appears
if the Temp reset Option is enabled
under Service Mode.
Option 18 – Hot Gas Bypass Type
The Hot Gas Bypass Type must be programmed based
on the option installed. Some chillers will not have hot
gas bypass installed. Others will have it installed on
System #1, System #2 or both systems.
The selected option is only displayed under the OP-
TIONS Key and must be programmed under the Ser-
vice Mode.
Option 19– Data Logging
This should be disabled.
Also see Figure 25 on page 123.
H O T G A S B Y P A S S T Y P E
N O N E
H O T G A S B Y P A S S T Y P E
S Y S T E M 1
H O T G A S B Y P A S S T Y P E
S Y S T E M 2
H O T G A S B Y P A S S T Y P E
B O T H S Y S T E M S
D A T A L O G T O F L A S H C A R D
O F F