QUANTECH
140
FORM QTC3-NM1
ISSUE DATE 08/03/2022
SECTION 7 – UNIT CONTROLS
Option 16 – 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. QTC3 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 28 on page 142.
Option 17 – 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, 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.
Option 18 – 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 – 10.0 (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.
Option 19 – Pump Control
Pump Control is utilized to operate the optional on-
board pump kit or to control an external pump through
dry contacts 23 and 24 on Terminal Block XTBC2. To
use this option, the following selection should be made
in the Service Mode:
H Y D R O
K I T P U M P S = 1
When HYDRO KIT PUMPS = 1, the controls will be
closed to run the pumps whenever any one of the fol-
lowing conditions are true:
• Low Leaving Chilled Liquid Fault
• Any compressor is running
• Daily Schedule is ON and Remote Stop is closed.
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