Trane TZONE940AC52Z Troubleshooting guide

TZONE940AC52Z

Communicating

Sensor

with

Display

Indoor Temperature

Cooling Heating

Heat to:

Humidity

Home

Screen

Clean

Zone

Auto

Hold

Outdoor Fan

Auto

SleepAway

Following Schedule

Table of Contents

Overview............. 2

Operation............ 3

Installation ........ 11

User &

Installation

Guide

Scan to see

installation and

help videos for

the 940 Sensor.

Section 1. General Information

1.1 Overview

This sensor is a wall mounted low voltage

control that allows a user to control the

temperature in the respective zone.

The sensor can be used in two different

ways:

• Stand-alone remote indoor temperature

and relative humidity sensor.

• Temperature and relative humidity*

sensor used to control individual zones

in zoning applications.

* For zoning applications, relative humidity control

is a system-level function. The 950 Control allows

the user to select the humidity-controlling zone.

*NOTE: For proper operation, some features of the

940 Sensor require software version 2.2 or later

on the 950 Control. Before proceeding, please be

sure the 950 Control is running software version

2.2 or later.

Indoor Temperature

Cooling Heating

Heat to:

Humidity

Home

Screen

Clean

Zone

Auto

Hold

Outdoor Fan

Auto

SleepAway

Following Schedule

2.1 Buttons and Indicators

Section 2. Operation

System Status

Notiﬁcation

Icons

Displays Outdoor

Temperature or

Humidity if available.

Touch to alternate.

Maintains the

current setpoints

permanently or until

a chosen time.

When touched, the

unit ignores input for

30 seconds so the

screen can be wiped

with a damp cloth.

Selecting Cooling or

Heating shows the

setpoint and allows

manual temperature

adjustment.

The desired

temperature the system

is targeting. Set

manually or by preset.

Setpoints/Adjustments

Outdoor Sensor

Hold Clean Screen

Display Selection

Setpoints

Current

Time

(from 950 Control)

Room

Temperature

Indoor

Relative

Humidity

One-touch buttons

allow quick access to

preset values.

Presets

The fan mode can

be set to Auto or On.

Fan Mode

The mode can be

set to Auto, Cool,

Heat or Off.

Zone Mode

1 Icons

Alert Triangle – A critical alert has been detected. Contact servicing dealer.

Signal Icon – The communicating sensor has lost communication. Contact servicing dealer.

Lock Icon – Indicates the screen has been locked by the 950 Control. When this lock is

present, the sensor will not respond to any keypad presses.

IMPORTANT: Do not use household cleaners or spray cleaners, including water spray

to clean the 940 zone sensor screen or enclosure. Household cleaners and sprays may

cause permanent damage to the zone sensor.

2 Setpoints - The setpoint is the desired temperature for each mode

(Heating or Cooling).

Select the heating or cooling button to adjust the temperature for that mode. Using the red or blue

arrow, adjust the temperature up or down.

If scheduling is enabled on the 950 Control, changing the setpoint on the 940 Sensor overrides the

scheduled setpoint until the next scheduled period. See the Hold section for additional information.

3 Presets - Three presets allow one-touch control of conditions.

Note: buttons will not be present if disabled from the 950 Control. (See Section 2.2)

These preset buttons on the 940 Sensor are conﬁgured from the 950 Control and allow one-touch

convenience for the common situations of Home, Away or Sleep.

These preset values are temporary and will revert to the 950 Control’s scheduled settings at its next

scheduled period.

5 Hold - This sensor offers three variations of Hold functionality that override the scheduled

setpoints.

Temporary Hold

Permanent Hold

Hold Until

NOTE: The Hold button is only visible when a schedule is enabled on the 950 Control.

Press Cancel Hold to resume schedule.

4 Fan Mode - Fan Mode is a system-level function. Changing the fan mode at any sensor will

change the system fan mode to reﬂect the last fan setting.

Permanent Hold - This feature is used to permanently override

the scheduled setpoints. Settings will persist until hold is canceled at

either the 940 Sensor or the 950 Control.

1) Press Hold -

Press Hold one time to enter Permanent Hold mode.

This zone’s schedule will be overridden and PERMANENT HOLD

appears on the display.

2) Adjust Setpoint -

Adjust the setpoint to the desired setting. To

cancel, press Cancel Hold.

Indoor Temperature Cooling Heating

Heat to:

Humidity

Home

Screen

Clean

Zone

Auto

Hold

Cancel

Outdoor

Hold

Fan

Auto

SleepAway

Permanent Hold

Temporary Hold - This feature temporarily overrides the

scheduled setpoints until the next scheduled period.

1) Adjust Setpoint -

Adjust the setpoint to the desired setting by

pressing the up and down arrows. After approximately 5 seconds, the

screen will display Holding Until with the time of the next scheduled

period. To cancel, press Cancel Hold.

Indoor Temperature Cooling Heating

Heat to:

Humidity

Home

Screen

Clean

Zone

Hold

Cancel

Outdoor

Hold

Fan

Auto

SleepAway

Holding Until:

Heat

Normal

Operation

When a 940

Sensor is fol-

lowing a sched-

ule, the screen

will appear in

this manner.

Indoor Temperature Cooling Heating

Heat to:

Humidity

Home

Screen

Clean

Zone

Heat

Hold

Outdoor Fan

Auto

SleepAway

Following Schedule

Hold Until - This feature overrides the scheduled setpoint until a user selected time is reached.

1) Press Hold Two Times -

Press Hold two times to enter Hold Until

mode.

2) Adjust Setpoint -

Adjust the setpoint to the desired setting.

3) Set End Time -

Set the time to return to the scheduled setpoints.

The screen will show Holding Until with the selected time. To cancel,

press Cancel Hold.

Indoor Temperature Cooling Heating

Heat to:

Humidity

Home

Screen

Clean

Zone

Hold

Cancel

Outdoor

Hold

Fan

Auto

SleepAway

Holding Until:

Heat

2.2 940 Sensor’s Screen Layout

The screen layout of the 940 Sensor can be

customized through the 950 Control.

MENU > SETTINGS >

SCREEN SETTINGS > ZONE SENSOR

Select the desired display settings. These

settings will update on the 940 Communicating

Sensor after selecting APPLY.

NOTE: If a zone without a 940 Communicating

Sensor is currently displayed, the following screen

will appear. Please note the zone in the top left.

Press either of the green arrows to switch to the

appropriate zone.

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