Table 4 -
Troubleshoo
Ɵ
ng
Problem
Display
Solu on
The following are common issues and solu ons. A more complete list and more
solu ons are on the manufacturer website.
No heat
GFCI TRIP
Reset by turning thermostat off/on.
Reset by turning circuit breaker off/on.
Electrician: Check for loose wire connections at
breaker and junctions. Check for short-circuit to
ground on heating system.
No heat
HEATING
Allow sufficient time. Verify floor is insulated.
Electrician: Check for correct resistance between
heating system power lead wires. Check for correct
voltage supplied to heating system. Check for correct
amps drawn by heating system.
No
display
None
Reset circuit breaker.
Check contacts between Power Module and Front
Module and clean with alcohol wipe.
Electrician: Check for loose wire connections at circuit
breaker and junctions. Check for correct voltage
between LINE1 and LINE2.
Heating
occurs
at the
wrong
times
HEATING
Check that the current time and schedule times are
properly set to AM or PM.
On uninsulated concrete slab floors the SmartStart
feature may start heating very early. You may turn
this feature off if not desired.
No heat
FLOOR
LIMIT
Check Floor Limit values (see Table 3).
No heat
95°F or
higher
Electrician: Check to make sure only one Floor Sensor
is attached.
Error Codes:
An error code may display due to a power glitch or other false
issue. Always:
1. Try clearing the Error code once by turning the thermostat off, resetting
the circuit breaker, and then turning the thermostat back on.
2. Check the contacts between Power Base and Front Module for dirt or
damage. Turn the circuit breaker off and remove the Front Module. Are
the contacts bent or dirty? Try gently cleaning them with a rubbing alcohol
wipe. Dirt or oil may have contaminated them during installation. In most
locations this step may be performed without an electrician since there
is no power available.
3. Check that the Mounting Screws are not too tight causing distortion. Turn
the circuit breaker off and remove the Front Module. Back the screws out
until the Power Base is just snug to the wall.
4. Check that both clips at the top are engaged and that the screw at the
bottom is snug.
If these actions and the following do not resolve the issue, turn off the
circuit breaker and contact the manufacturer for direction. Do not continue
using the system to prevent further risk of damage, fire, or electrical shock.
Speci
fi
ca ons
Power Supply
120 / 240 VAC, 50/60 Hz
Maximum Load
15 A, resistive
Maximum Power
1800 W at 120 VAC / 3600 W at 240 VAC
GFCI
Class A (5 mA trip nominal)
Display Range
32
ᵒ
F to 99
ᵒ
F (0
ᵒ
C to 37
ᵒ
C)
Setting Range
40
ᵒ
F to 99
ᵒ
F (4
ᵒ
C to 37
ᵒ
C)
Accuracy
± 0.9
ᵒ
F (0.5
ᵒ
C)
Environment
Indoor dry location only
Storage Temperature
0
ᵒ
F to 120
ᵒ
F (-17
ᵒ
C to 49
ᵒ
C)
Floor Sensor
Thermistor, 10k NTC type, double insulated, Class2
Memory
Programming retained indefinitely. Current time/day will
need reset if power is lost more than 30 minutes.
ETL Listing
Control No. 3037530. Conforms to UL 873, UL 943, CSA
C22.2 No. 24, CSA/CAN C22.2 No. 144.
Limited Warranty
Watts Radiant warrants this control (the product) to be free from defect in
material and workmanship for a period of (3) years from the date of original
purchase from authorized dealers. During this period, Watts Radiant will replace
the product or refund the original cost of the product at Watts Radiant’s option,
without charge, if the product is proven defective in normal use. Please return
the control to your distributor to begin the warranty process.
This limited warranty does not cover shipping costs. Nor does it cover a product
subjected to misuse or accidental damage. This warranty does not cover the
cost of installation, diagnosis, removal or reinstallation, or any material costs
or loss of use.
This limited warranty is in lieu of all other warranties, obligations, or liabilities
expressed or implied by the company. In no event shall Watts Radiant be liable for
consequential or incidental damages resulting from installation of this product.
Some states or provinces do not allow limitations on how long an implied
warranty lasts, or the exclusion or limitation of incidental or consequential
damages, so the above exclusions or limitations may not apply to you. This
warranty gives you specific legal rights and you may also have other rights that
vary from state to state.
Table 4 -
Troubleshoo
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nued
Other Features
These other features are available on the thermostat.
Lockout
The thermostat has the ability to lock out adjustments. This may be useful in
public locations. To use this feature, press or buttons at the same time
and hold for 2 seconds. “LOCK” will show in the display. To cancel, press or
buttons at the same time and hold for 2 seconds.
Calibration
Under special circumstances it may be desired to slightly adjust the temperature
that is displayed for the sensor. Normally this is not recommended. However,
it can be done by pressing
SETUP
for 1 second. The display will show “CAL” and
the current sensor temperature and the offset value. Adjust by pressing or
buttons. Press
OK
to save and return to the home screen.
Troubleshooting
If problems arise with the thermostat, please consult this troubleshooting
guide. If not qualified to perform electrical work, it is highly recommended
a qualified, licensed electrician be hired. Any electrical troubleshooting work
should be performed with the power removed from the circuit, unless otherwise
noted. Although this troubleshooting guide is provided to assist with problems
experienced with a system, results are never guaranteed. Watts Radiant does
not assume any liability or responsibility for damage or injury that may occur
from using this guide. If problems with the system persist, call the manufacturer.
Problem
Display
Solu on
No heat
Err1
Floor Sensor may be wrong type.
Electrician: Check floor sensor resistance. See Table 1 in the
Installation section above.
No heat
Err2
Floor Sensor wires may be crossed.
Electrician: Check if the Floor Sensor wires crossed and
short-circuited. Check Floor Sensor resistance (see Table
1 in the Installation section above).
No heat
Err3
Floor Sensor wires may not be connected.
Check Floor Sensor connections and mounting screws as
stated above.
Electrician: Check if Floor Sensor is attached. If not, attach
and reset the circuit breaker.
No heat
Err4 or Err5
and Air
Internal air sensor may be faulty.
Change setting to Floor Sensing mode (see Table 3 above).
No heat
Err6
Internal temperature limit may be exceeded.
Check if sunlight or other heat source is causing added heat
to thermostat.
Electrician: Check if load exceeds 15 amps.
No heat
Err7
Contacts or internal connections may be faulty.
Check connections and mounting screws as stated above.
Reset circuit breaker.
No heat
Err8
Internal device error.
A Watts Water Technologies Company
USA: Springfi eld, MO • Tel. (800) 276-2419 •
Fax: (417) 864-8161 • www.wattsradiant.com
IOM-WR-SS-PRO2 1408
© 2014 Watts Radiant
WARNING: This product contains chemicals known to the State of California to cause cancer
and birth defects or other reproductive harm. For more information: www.watts.com/prop65
