White Rodgers F145-1328 Wired Indoor Remote Sensor Troubleshooting Guide

REMOTE SENSORS

REMOTE SENSOR

WIRING

–

To + or S1

To S or S2

To - or S3

Thermostat Subbase

–

To +

To OT

To -

Outdoor Probe

Remote Sensor

Note

Note: When using shielded cable, connect shield of 18 or

20 gauge 3 connector cable to - or S3 on thermostat

subbase.

Remote Outoor Sensor

Staging Multi-Stage or Heat Pump Touchscreen Thermostat (1F95-1277) Indoor/Outdoor Remote

Sensor Wiring (F145-1328/F145-1378)

If connecting

outdoor service

Troubleshooting Chart

To function correctly and read temperature accurately, the thermostat must have constant 24-volt power. If the thermostat

temperature is steadily dropping, reading low, or reads 08°

08°

08° when a remote sensor is installed, it can be traced to one of the

three following conditions.

Condition

Test

Comments

1. Loss of 24-volt power. On models with batteries, remove the batteries and re-install

For the sensor to read correctly,

thermostat. If the display is blank, check heating and cooling

the 24-volt system power

must

system to determine why 24-volt power is absent.

be present. Some systems may

require an isolation relay to pro-

vide constant power to the

thermostat. Limit or safety

devices in the equipment can

also cause a power interruption.

2. A broken wire on S1,

Disconnect sensor wires at thermostat. Attach a short piece

Repair or replace the 3 wire

S2 and S3 or (+, SA, -)

(2') of three-wire shielded cable to S1, S2 and S3 or (+, SA,

shielded cable. Be sure the

from the thermostat to

-) on the subbase. Bring the remote sensor to the thermostat remote wire run is not parallel

the remote.

location and attach S1, S2 and S3 or (+, S, -) respectively.

to line voltage wires that carry

Reattach thermostat. If the temperature begins to climb

heavy inductive loads, or across

(slowly), it is reading correctly. If it reads correctly with the 2'

fluorescent light ballasts that

length but improperly when attached to the wire run, it

may cause an inductance to be

3. A shorted or

Because it is an electronic sensor, there are no Ohm values

Replace remote sensor.

damaged remote sensor. to test. If correct conditions as listed in 1 & 2 above and the

temperature stays at or near 08°

08°

08°, it indicates a shorted or

damaged remote sensor.

Note

Note: Digital thermostats and remote sensors acclimate very slowly to temperature change. It may take an hour or more for

the temperature to acclimate to the room temperature from a low temperature reading as outlined above. To expedite the

room temperature display use the reset instructions listed in the installation instructions for the thermostat model you are

working with. When reset, the thermostat will default to a room temperature of 70° and begin sensing room temperature. Be

sure to reconfigure the installer menu for a remote sensor because the reset function may cancel remote sensing.

Single Stage Thermostat Remote Sensor Wiring (F145-1328)

Thermostat Subbase

–

To + or S1

To S or S2

To - or S3

Remote Sensor

Note

Note: When using shielded cable, connect shield of 18 or

20 gauge 3 connector cable to - or S3 on thermostat

subbase.

S1 S2 S3

+ S -

Troubleshooting Chart

To function correctly and read temperature accurately, the thermostat must have constant 24-volt power. If the thermostat

temperature is steadily dropping, reading low, or reads 08°

08°

08° when a remote sensor is installed, it can be traced to one of the

three following conditions.

Condition

Test

Comments

1. Loss of 24-volt power. On models with batteries, remove the batteries and re-install

For the sensor to read correctly,

thermostat. If the display is blank, check heating and cooling

the 24-volt system power

must

system to determine why 24-volt power is absent.

be present. Some systems may

require an isolation relay to pro-

vide constant power to the

thermostat. Limit or safety

devices in the equipment can

also cause a power interruption.

2. A broken wire on S1,

Disconnect sensor wires at thermostat. Attach a short piece

Repair or replace the 3 wire

S2 and S3 or (+, SA, -)

(2') of three-wire shielded cable to S1, S2 and S3 or (+, SA,

shielded cable. Be sure the

from the thermostat to

-) on the subbase. Bring the remote sensor to the thermostat remote wire run is not parallel

the remote.

location and attach S1, S2 and S3 or (+, S, -) respectively.

to line voltage wires that carry

Reattach thermostat. If the temperature begins to climb

heavy inductive loads, or across

(slowly), it is reading correctly. If it reads correctly with the 2'

fluorescent light ballasts that

length but improperly when attached to the wire run, it

may cause an inductance to be

3. A shorted or

Because it is an electronic sensor, there are no Ohm values

Replace remote sensor.

damaged remote sensor. to test. If correct conditions as listed in 1 & 2 above and the

temperature stays at or near 08°

08°

08°, it indicates a shorted or

damaged remote sensor.

Note

Note: Digital thermostats and remote sensors acclimate very slowly to temperature change. It may take an hour or more for

the temperature to acclimate to the room temperature from a low temperature reading as outlined above. To expedite the

room temperature display use the reset instructions listed in the installation instructions for the thermostat model you are

working with. When reset, the thermostat will default to a room temperature of 70° and begin sensing room temperature. Be

sure to reconfigure the installer menu for a remote sensor because the reset function may cancel remote sensing.

TECHNICAL

HELP

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