York YLUA0078 Installation Operation & Maintenance page 127

FORM 150.73-NM1
ISSUE DATE: 09/04/2020
Option 14 – Refrigerant Type
R E F R I G E R A N T
R - 4 1 0 A
Refrigerant type R-407C or R-410A may be selected
under Service Mode. Refrigerant type is displayed un-
der the Options Key, but is only programmable in Ser-
vice Mode.
Incorrect programming may cause dam-
age to compressors. R-410A MUST be
programmed.
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 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 dam-
age to compressors.
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 unit 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.
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
JOHNSON CONTROLS
T Y P E
V A L V E T Y P E
U P D A T E
U P D A T E
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
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 utilized. Incorrect unit 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 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 Remote
Temp Reset Input only appears if the Temp
reset Option is enabled under Service
Mode.
SECTION 7 – UNIT CONTROLS
U P D A T I N G
U P D A T E
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R E S E T
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