Aprilaire S86N MU Multi Stage Universal Thermostat Instruction Manual
FAN DOES NOT TURN ON IN A CALL FOR HEAT
“HEATING” IS NOT DISPLAYED
TROUBLESHOOTING
• Check System Setting (Fan Control in
Heating), to make sure the fan control is
properly set to match the type of system
(see page 19)ꢀ
• Check System Setting (Control Setup) is set
correctlyꢀ
DISPLAY IS BLANK
TEMPERATURE SETTINGS DO NOT CHANGE
• Change the System Mode to Heat, and set
the temperature level above the current
room temperatureꢀ
• Check circuit breaker and reset if necessaryꢀ
• Make sure heating and cooling
temperatures are set to acceptable ranges:
• Make sure power switch at heating &
cooling system is onꢀ
HEAT PUMP ISSUES COOL AIR IN HEAT MODE,
OR WARM AIR IN COOL MODE
− Heat: 40° to 90°F (4° to 32°C)ꢀ
“COOLING” IS NOT DISPLAYED
• Make sure furnace door is closed securelyꢀ
− Cool: 50° to 99°F (10° to 37°C)ꢀ
• Check System Setting (O/B Operation) to
make sure the reversing valve operation
matches the heat pumpꢀ
• Check System Setting (Control Setup) is set
correctlyꢀ
HEATING SYSTEM DOES NOT RESPOND
(“HEATING” APPEARS ON SCREEN)
COOLING SYSTEM DOES NOT RESPOND
(“COOLING” APPEARS ON SCREEN)
• Change the System Mode to Cool, and set
the temperature level below the current
room temperatureꢀ
HEAT/COOL BOTH ON AT SAME TIME.
• Check for 24VAC at the equipment on the
secondary side of the transformer between
power and commonꢀ If voltage is not
present, check the heating equipment to
find the cause of the problem.
• Check for 24VAC at the equipment on the
secondary side of the transformer between
power and commonꢀ If voltage is not
present, check the cooling equipment to
find the cause of the problem
• Check System Setting (Equipment Type), to
make sure it is set to match the installed
heating/cooling equipment (see page 18)ꢀ
HUMIDIFIER DOES NOT OPERATE IN AUTO
MODE (S86N MUPR ONLY)
• Check to make sure heating and cooling
wires are not shorted togetherꢀ
• Check Installer System Setting number
(Outdoor Sensor) is set to Yesꢀ
• Check for 24VAC between the heat terminal
(W) and the transformer commonꢀ If 24VAC
is present, the thermostat is functionalꢀ
Check the heating equipment to find the
cause of the problemꢀ
• Check for 24VAC between the cooling
terminal (Y) and the transformer commonꢀ
If 24VAC is present, the thermostat is
functionalꢀ Check the cooling system to
find the cause of the problem.
• Verify that the outdoor sensor is functioning
correctlyꢀ If the sensor is functioning
correctly the outdoor temperature will
display in the outdoor temperature
location (see SCREEN SAVER on page 39 for
the location)ꢀ
HEATING EQUIPMENT IS RUNNING IN
COOL MODE
• Check System Setting (Equipment Type), to
make sure it is set to match the installed
heating/cooling equipment (see page 18)ꢀ
• Check for loose or broken wires between
the thermostat and the heating equipmentꢀ
• Check for loose or broken wires between
the thermostat and the cooling equipmentꢀ
40
41
| General | Details |
|---|---|
| Name | Aprilaire S86N MU Multi Stage Universal Thermostat Instruction Manual |
| Make | Aprilaire |
| Language | English |
| Filetype | PDF (Download) |
| File size | 0.37 MB |
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