12
T
HERMOSTAT
M
ENU
If this modular blower is installed with a CT™ compatible heat
pump, the system is recognized as a heat pump system. The
electric heat disabled temperature and heat pump disabled
temperature must be set via the thermostat advanced menu.
Navigate to the
THERMOSTAT
menu. Press the
INSTALLER
CONFIG
key. Navigate to the
SETUP
menu and press the
INSTALLER CONFIG
button. Navigate to
AUX HT LOCK-
OUT
. Adjust the electric heat disabled temperature to the
desired setting using the back/forward arrows. Navigate to
HP BAL PNT
. Adjust the heat pump disabled temperature to
the desired setting using the back/forward arrows.
D
IAGNOSTICS
Accessing the modular blower’s diagnostics menu provides
ready access to the last six faults detected by the modular
blower. Faults are stored most recent to least recent. Any
consecutively repeated fault is stored a maximum of three
times. Example: A clogged return air filter causes the modu-
lar blower’s motor to repeatedly enter a limiting condition.
The control will only store this fault the first three
consecutive
times the fault occurs. Navigate to the diagnostics menu as
described above in
Accessing and Navigating the Advanced
Features Menus
.
NOTE:
It is highly recommended that the fault history be
cleared when performing maintenance or servicing the
modular blower.
N
ETWORK
TROUBLESHOOTING
NOTE: Indoor Unit BIAS and TERMINATION Dipswitches
are factory set and should not be changed.
1
2
ON
OFF
3
BIAS
BIAS
TERM
Indoor Unit BIAS and TERMINATION Dipswitches
The ComfortNet™ system is a fully communicating system,
and thus, constitutes a network. Occasionally the need to
troubleshoot the network may arise. The integrated control
has some on-board tools that may be used to troubleshoot
the network. These tools are: red communications LED,
green receive (Rx) LED, and LEARN button.
•
Red communications LED – Indicates the status of
the network. The table below indicates the LED
status and the corresponding potential problem.
•
Green receive LED – Indicates network traffic. The
table below indicates the LED status and the
corresponding potential problem.
•
Learn button – Used to reset the network. Depress
the button for approximately 2 seconds to reset the
network.
S
YSTEM
T
ROUBLESHOOTING
NOTE:
Refer to the instructions accompanying the CT™
compatible outdoor AC/HP unit for troubleshooting
information.
Refer to the Troubleshooting Chart in the Appendix for a list-
ing of possible modular blower error codes, possible causes
and corrective actions.
Summary of Contents for MBVC
Page 14: ...14 APPENDIX A ...
