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If static pressure cannot be accurately calculated, the dis-
S
play will read UNKNOWN. When this is seen, the sys-
tem is adjusting to high static pressure by cutting back
blower RPM.
Service - - Last 10 System Events
LAST 10 EVENTS
3/2/05
HP
LOW PRESSURE
SWITCH OPEN
3 EVENTS:
FN 2/28/05 6:10 PM
41-BLOWER MOTOR FAULT
225 EVENTS
F=FAULT
< BACK
Fig. 33 - - Last 10 System Events
This screen will show last 10 events that occurred throughout the
system. Each entry has the time and date incident recorded. Service
technician should enter current date in "TODAY'S DATE"menu
section BEFORE checking and logging the last 10 system events.
Each entry has a two- -letter acronym preceding the event name to
identify which piece of equipment generated the event. This event
history can be cleared under Thermostat Setup, Reset Factory
Defaults.
HP = Heat Pump
AC = Air Conditioner
FN = Furnace
FC = Fan Coil
SPP = Packaged product
SAM = System Access Module
Service - - Run / Fault History
The indoor unit and outdoor unit (if communicating) have the
following histories:
NOTE: For Critical Fault Screens, see Troubleshooting section in
this document.
Resettable Faults:
Fault counters for each piece of equipment that can be
S
reset.
Cycle Counters:
Number of heat/cool/power cycles the unit has per-
S
formed.
Run Times:
Lifetime hours of operation in heating, cooling, and how
S
long the unit has been powered.
Service - - Today's Date
This menu item allows the installer to enter the current date. It is
used for time/date stamping of system faults. This should be
entered every time prior to viewing "LAST 10 SYSTEM
EVENTS" section.
Service - - Model / Serial Numbers
This menu item allows the installer to view the model number and
serial number (if available) of all communicating pieces of
equipment in the system. This is only available in original factory
supplied circuit board. If a circuit board is replaced, the model and
serial number information is no longer available.
Service - - Service Phone Number
This menu item allows the installer to enter a name and phone
number that the homeowner can call for future service of the
system. This name and phone number will appear to the
homeowner whenever a service reminder pop- -up message is
displayed (i.e. Change Filter, etc.)
2:35 PM
ACTIVE
F
_
MORE >
A07032
To edit:
Use Temp +/- - button to move cursor left and right.
S
Use Time +/- - button to select numbers and letters.
S
Use Scroll button to move up and down between NAME
S
and NUMBER.
OPERATIONAL INFORMATION
Continuous Fan Operation
Pressing FAN button will scroll through the following:
AUTO = No fan operation except during equipment op-
S
eration.
LOW = Approximately 50% of High Speed operation.
S
MED = Half way between High and Low speed opera-
S
tion.
HIGH = Highest of either High Heating or High Cooling
S
CFM.
Continuous fan operation is programmable. The programming
option must be enabled in the Thermostat Setup. See the
Homeowner's Manual for detailed instructions on programming
the fan.
Five- - Minute Compressor Timeguard
This timer prevents compressor from starting unless it has been off
for at least 5 minutes. It can be defeated by simultaneously pressing
the Fan and Temp + buttons.
Emergency Heat (for heat pump applications)
To activate Emergency Heat, you must press and hold the HEAT
button for 3 seconds to activate. Repeat to deactivate.
Heat Source Selection (Hybrid or Hydronic Heat)
If user wishes to override normal operation in Hybrid Heat or
Hydronic Heat applications, press and hold the heat button for 3
seconds to select desired heat source.
Keypad Lockout
Keypad can be locked by pressing "Fan" and "Humidity/Oat"
buttons at the same time for 3 seconds. When keys are locked, a
lock symbol will appear in the upper left corner of screen. Follow
same procedure to unlock keypad.
Heat and Cool LED
The Heat and Cool LEDs will pulsate during actual equipment
operation. This can be defeated in the Advanced Setup Screens.
Equipment Cycle Timer (adjustable 4- - 6 cycles per
hour)
This timer prevents the start of a heating or cooling cycle until 15
(or 10) minutes after the last start of the same cycle. Its function is
to assure that the equipment is not cycled more than the selected
times per hour. This timer is adjustable from 4 to 6 cycles per hour.
This timer is defeated for one cycle when the desired temperature is
manually changed. It can also be defeated for one cycle by
simultaneously pressing the Fan and Temp + buttons.
Staging Timer
In multistage heating or cooling, this timer prevents any higher
stage from turning on until the preceding stage has been on for 10
minutes.
For furnace heating, the high stage timer is adjustable to force
longer minimum low stage run time. See Furnace Setup for details.
A demand of 5_F or more will override the staging timer and allow
higher stages to energize.
In Hybrid Heat, the staging timer is 15 minutes between heat pump
and gas furnace operation. This timer is adjustable in the Hybrid
Heat Setup menu to force longer minimum heat pump run time and
longer low stage furnace run time. A demand of 5_F or more will
override the staging timer and allow higher stages to energize.
14
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