Peco Performance Pro T12000 Series Installation Manual page 8

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In case of difficulty, try one of the following suggestions below.
symptom
If display screen is blank
If display screen is blank AND system is running AC
power only
If keys do not respond
If Service Indicator (wrench) is on
Setpoint limits do not change
If no heating or cooling is running, but there is a call
for heat or cool (Heat/Cool appears on display) in
Auto mode
If heating and cooling system doesn't respond
If heating and cooling equipment are running at the
same time
Heat does not turn on (Heat is on continuously on
display)
If heat pump issues cool air in heat mode or warm air
in cool mode
Cooling does not turn on (Cool is on display) in Auto
mode
If fan does not turn on when there is a demand for
heat
If heating system is running in the cool mode
If heating equipment does not turn off and heat
temperature setting is set below room temperature
If the user cannot select the system setting for cool
If the user cannot select the system setting for heat
If Heat does not appear on the display
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Potential cause(s)
• Thermostat is not being powered
• Default Display is set to "4" (None)
• Power harvesting is enabled without battery
support
• Keypad Lockout may be enabled
• Remote temperature sensors may not be
installed correctly or may be damaged.
• Heat or cool setpoint limit has been reached
• Keypad is locked
• Heating or cooling equipment is not operating
• System type selection is incorrect
• System type selection is incorrect
• Heating and cooling wires are shorted together
• Heating equipment failure
• Loose or broken wire connection between
heating equipment and thermostat
• Changeover valve (B/O terminal) is not
configured to match the heat pump
• Cooling equipment failure
• Loose or broken wire between cooling
equipment and thermostat
• System type may be incorrect
• Fan Control may be incorrect
• System type selection is incorrect
• Heating equipment is not a heat pump but
system type selected is heat pump
• System type is set to Heat only or Heat only
with fan
• System type is set to Cool only.
• System type setting is not set to Heat and/or
temperature setting is not set above the room
temperature
8
solution
• Check to assure connection between Common (C) and (RC) for 24 VAC.
• Check to assure that the metal jumper connects "RC" and "RH" (on
single transformer system only).
• Check to assure AA batteries are installed properly and are charged.
• Check Service Menu 520
• Install batteries and select "0" (disabled) in Service Menu 510 (to disable
Power Harvesting).
• Access Service Menu 340. Within this menu, select option "0" to assure
there is no keypad lockout (so manual entry is enabled).
• Check to assure that remote temperature sensor is connected properly.
Ensure that the system uses PECO-approved sensor(s).
• Check range limits and deadband (see Service Menus 290, 300, 380).
• See item above
• Check Service Menu 110 to assure that the correct option is selected to
match the system type.
• Check wiring, using output tests to verify (see Service Menus 600, 610,
620, 630, 640).
• Check Service Menu 110 to assure that the correct option is selected to
match the system type.
• Check Service Menu 110 to assure that the correct option to match the
system type is selected.
• Separate the heating and cooling wires, using output tests to verify (see
Service Menus 600, 610, 620, 630, 640).
• Check for 24 VAC at the equipment on the secondary side of the
transformer between the Power for Heating (RH) and the Common (C)
• Check to assure 24 VAC connection between heat terminal (W1) and
transformer Common (C). If 24 VAC is present, thermostat is functional.
Check heating equipment to find cause of failure. If voltage is not
present, check wire connection between the heating equipment and the
thermostat.
• Check Service Menu 130 to assure that the changeover valve (B/O
terminal) is set to properly match the heat pump.
• Check for 24 VAC at the equipment on the secondary side of the
transformer between the Power for Cooling (RC) and the Common (C).
• Check to assure 24 VAC connection between the cool terminal (Y1) and
transformer Common (C). If 24 VAC is present, thermostat is functional.
Check cooling equipment to find cause of failure. If voltage is not
present, check the wire connection between the cooling equipment and
the thermostat.
• See Service Menu 110 and assure that the correct option is selected.
• See Service Menu 120 and assure that the correct option is selected.
• Check Service Menu 110 to assure that the correct option is selected to
match the system type.
• Check Service Menu 110 to assure that the correct option is selected to
match the system type.
• Check Service Menu 110 to assure that the correct option is selected to
match the system type.
• Check Service Menu 110 to assure that the correct option is selected to
match the system type.
• Set the system setting to "Heat" and adjust the temperature setting to be
above the room temperature. Verify heating equipment activates.
P/N 70480 3220-2269 REV 00