Troubleshooting - Carrier TC-PBO01-BLK Installation Manual

Fig. 3 - Conventional Heat Pump Typical Installation
Equipment configuration: HP
Fig. 4 - Heat Pump, No Common Wire
Equipment configuration: HP
Fig. 5 - Heat Pump + 2
Equipment configuration: HP
THERMOSTAT OPERATION FEATURES
Timeguard Timer
A 5- minute timeguard is built into the thermostat immediately
upon power- up, and any time the compressor turns off. The
compressor will not turn on until the timeguard has expired. The
timeguard affects only compressor operation. Pressing UP and
FAN buttons simultaneously will override the timeguard for 1
Copyright 2017 Carrier Corp. S 7310 W. Morris St. S Indianapolis, IN 46231
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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Stage of Heat
Edition Date: 02/17
cycle. With PH or PC selected under Option 1, this timer is
defeated.
Cycle Timer
In normal heating and cooling operation the thermostat will not
allow more than 4 equipment cycles per hour (or 1 cycle every 15
minutes). Both the Y and W outputs have a 15 minute timer that
starts counting down when the output is turned on, (e.g., if Y
output is turned on for 9 minutes and then satisfies, it cannot turn
back on for another 6 minutes regardless of demand). However,
pressing UP and FAN buttons simultaneously or changing the
setpoint will override the timer for 1 cycle.
Minimum On Timer
Once the equipment has turned on, it will remain on for a
minimum of 3 minutes regardless of demand. However, the
equipment can turn off in less than 3 minutes if a change in
setpoint or a change in mode occurs.
Staging Timer
If the thermostat is configured for a heat pump application, it has
2- stage heat capability. In normal operation there is a 15 minute
delay between the first and second stages of heat. The Y output
will energize first, then 15 minutes later, W is allowed to come on
if the thermostat determines it is not satisfying the demand.
However, if the heating demand is greater than 5°F/3°C, there will
be only a 30 second delay before bringing on W.

TROUBLESHOOTING

Your thermostat does not power on:
Check the following:
1. Turn off the power to your system. Check that all wires are
properly inserted into the terminal blocks at the thermostat.
2. Tug lightly on the wires to ensure they are not loose.
3. Ensure you turned the power back on to the equipment ei-
ther at the switch at the indoor equipment or the electrical
panel (where you originally turned off the equipment).
4. If your device still doesn't power on check the AC voltage
between Rc and C or Rh and C using a multi- meter to en-
sure it is 24V AC.
5. If your device still does not power on, please contact:
S Technical support at 1.800.CARRIER or contact
contact.carrier@carrier.utc.com
6. Find an Expert Carrier Contractor at carrier.com/dealers
Backlight will not come on:
S If your thermostat is installed without a Common (C) wire and
when the battery is low, the backlight will remain off with button
presses.
Error Messages:
1. Two dashes (- - ) appear in the temperature display
S The thermostat must be replaced. The room temperature
sensor failsed and all heating and cooling outputs will be
turned off.
2. E4 alternately flashes with the temperature on the display
S The thermostat must be replaced. All heating and cooling
outputs will be turned off.
6
Catalog No:TC - PBO01BLK- 02SI
Replaces: TC- PBO01BLK- 01SI