JOHNSON CONTROLS
136
FORM 150.72-ICOM7
ISSUE DATE: 10/22/2020
SECTION 7 – UNIT CONTROLS
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, 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 32 on page 139.
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 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.
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 chiller until the up-
date 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 the update resulted in an error, the original program
will still be active. When an error occurs, ensure the
correct Flash Card was used. Incorrect chiller 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 R E S E T
I N P U T XXXXXXXXXXXXXX
Remote Temp Reset input selection is programmable
according to the type of input used. The following op-
tions are available:
• DISABLED (default)
• 0.0 – 10.0 (DC)
• 2.0 – 10.0 V (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 Ser-
vice Mode. The option must be enabled
under the Service Mode for the Remote
Temperature Reset to operate.
To Next Page
Loading...