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SECTION 7 – UNIT CONTROLS
Option 15 – Unit Type
U N I T
L I Q U I D
The UNIT TYPE message cannot be modified under
the UNIT keys.
"LIQUID CHILLER" must be displayed,
or damage to compressors or other com-
ponents will occur if operated in the
CONDENSING UNIT modes.
If Unit Type needs to be changed to make the unit a liq-
uid chiller, remove power and then remove the jumper
on J11-12. Reapply power to the micropanel and the
microprocessor will store the change.
Option 16 – Refrigerant Type
R E F R I G E R A N T
R – 4 1 0 A
Refrigerant type R-410A must be selected under Ser-
vice Mode. Refrigerant type is displayed under the
OPTIONS key, but is only programmable in Service
Mode.
Incorrect programming may cause dam-
age to compressors.
Option 17 – 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, 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. Always use "Thermo-
static" for valve type regardless of whether an EEV or
TXV is used. This is required since the EEV controller
is external to the chiller microprocessor.
142
T Y P E
C H I L L E R
T Y P E
V A L V E
T Y P E
Incorrect programming may cause dam-
age to compressors.
Also see the UNIT KEYS PROGRAMMING QUICK
REFERENCE LIST on Figure 35 on page 145.
Option 18 – 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 chiller 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
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
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, assure the
correct Flash Card was utilized. Incorrect chiller 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.
FORM 201.26-NM1
ISSUE DATE: 1/19/2018
U P D A T E
U P D A T E
U P D A T I N G
U P D A T E
XXXXX
JOHNSON CONTROLS
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Troubleshooting
