iO HVAC Controls iO-WR User manual

Wireless Relay
Troubleshooting Guide
Only for use with the iO-WR
www.iohvaccontrols.com
For Technical Support Call Toll Free: 866-225-5032

2
Board Layout & LED Denitions
iO-WR-BM
iO-WR-SM
Reset Button
Base Module Checked Box
Terminal Designations
3 Send Channels
1 Receive Channel
Program/Reset
Button
LED Indicator
Communicating – Solid Green w/ Blinking Red Every 15 Seconds
Loss of Communications – Solid Red
Ready to Pair with SM – Alternating Blinking between Green and Red
Satellite Module Checked Box
Terminal Designations
1 Send Channel
3 Receive Channels
LED Indicator
Communicating – Solid Green w/ Blinking Red Every 15 Seconds
Loss of Communications – Solid Red
Ready to Pair with BM – Blinking Red Every 3 Seconds

3
Mounting & Installation Location
IMPORTANT:
The iO-WR should never be installed or mounted on a metallic surface.
It should never be installed inside of the cabinet of the indoor unit or
compressor.
Mounting the iO-WR on or inside of a metallic surface will result is a
signicant drop in signal strength.
The iO-WR can communicate up to 100 feet line of sight. The distance it is able
to communicate decreases based on the type of building material on the job
sight and the quantity of material the iO-WR is trying to transmit through.
These constraints should be taken in to consideration when determining the
best installation location for the iO-WR in any given application.

4
Wiring the iO-WR
If the iO-WR modules are both showing that they are communicating with one
another (see page 2), but the outdoor unit is not turning on when the thermostat
makes a ‘Y’ call, then there is either a wiring issue or a thermostat issue.
To test this, insert a jumper between ‘24V HOT’ and ‘CH1 SEND’ on the Base Module
and check if the outdoor unit turns on.
If the outdoor unit turned on, then there is likely a wiring issue at the indoor unit or
an issue with the thermostat.
If the outdoor unit did not turn on, then there is likely a wiring issue at the outdoor
unit.
See pages 5 and 6 for assistance with wiring the iO-WR.
iO-WR-BM iO-WR-SM
24Vac
Did the
compressor
turn on?
Jumper

5
Typical Single Stage
Compressor Wiring
iO-WR-BM
C
R
W
Y
G
riAroodnI
reldnaH T slanimre
iO-WR-SM
24Vac 240 Vac
TR-40-MT
rosserpmoC
V42 lioCrotcatnoCca

6
Typical Single Stage
Heat Pump Wiring
iO-WR-BM
C
R
W
O
Y
G
riAroodnI
reldnaH T slanimre
iO-WR-SM
24Vac 240 Vac
TR-40-MT
C
R
O
Y
W (Defrost)
pmuPtaeH
draoBtsorfeD

7
Loss of Communications
IMPORTANT:
The iO-WR should never be installed or mounted on a metallic surface.
It should never be installed inside of the cabinet of the indoor unit or
compressor.
Mounting the iO-WR on or inside of a metallic surface will result is a
signicant drop in signal strength.
If the iO-WR has indicated that communications have been lost which will
be evident by a solid red LED on both modules, make sure neither module is
mounted on a metallic surface. If either module is mounted on or inside of a
metallic surface, move the module away from the metal and see if the modules
begin to communicate. This will be known by LED indication of solid green
followed by quick red ashes.
If after both modules are moved away from all metallic surfaces, the iO-WR still
is not communicating, follow the steps on pages 8 and 9 to reset and reprogram
the iO-WR.

8
Resetting & Reprogramming
the iO-WR
Resetting
1. Bring the Base Module and Satellite Module next to each other. They can
share the same power supply.
2. On each module, press and hold the push button as power is applied. This
step does not need to be completed simultaneously on both the Base
Module and the Satellite Module. After this is done, the LEDs should indicate
each module is ready to pair – see page 2.
iO-WR-BM iO-WR-SM
Energize 24Vac with the
Button on either/both
module(s) held down

9
Resetting & Reprogramming
the iO-WR
Reprogramming
1. Once both modules’ LEDs are indicting that they’re ready to pair, press the
button on the satellite module.
2. Conrm both modules’ LEDs show that they are paired by showing solid
green followed by red ashes.
If after these steps are taken, the iO-WR is still unable to communicate,
contact iO HVAC Controls for further tech support.
3. Remove power from the iO-WR modules and install each module in it’s
intended location as far from metallic surfaces as possible.
iO-06-1339-091020
iO-WR-BM iO-WR-SM
24Vac Constant Power