LUX ELV4 Betriebsanleitung

Troubleshooting Poor Temperature Regulation

• This page lists problems that may affect the temperature performance of your LUX

thermostat with suggested resolutions.

• For more detailed information please refer to the instructions that came with your

thermostat.

Model

ELV4

Problem

Resolution

Indicates incorrect room temperature

Refer to thermostat manual to verify that your set temperature

is what you expect it to be.

Heats more than 5 degrees past its

displayed set temperature

Refer to thermostat manual to verify that your set temperature

is what you expect it to be.

Replace the batteries with fresh Duracell® or Energizer®

alkaline batteries.

Adjust set temperature to at least 5 degrees below room

temperature. Then adjust set temperature upward one degree

at a time. Listen carefully for a soft click from the thermostat.

This click should be heard near room temperature. Adjust set

temperature down one degree at a time. Again listen carefully

for a soft click from the thermostat near room temperature.

Refer to your unit's manual to decrease the units swing value

to a narrower setting.

Verify that your unit's placement and mounting are optimum

per the installation section of its manual.

No heat when expected

Refer to thermostat manual to verify that your set temperature

is what you expect it to be.

Refer to wiring to verify that it is according to the unit's wiring

diagram. Verify that all connections are to your thermostat are

clean and tight.

Replace the batteries with fresh Duracell® or Energizer®

alkaline batteries. Press reset with small Phillips screw driver.

It may be necessary to reconfigure some settings after a

reset.

Heat Test

Adjust set temperature to at least 5 degrees below room

temperature. Then adjust set temperature upward one degree

at a time. Listen carefully for a soft click from the thermostat.

This click should be heard near room temperature. Heat

should operate immediately.

Adjust set temperature down one degree at a time. Again

listen carefully for a soft click from the thermostat near room

temperature. Heat should switch off immediately.

Advanced Troubleshooting

This thermostat is designed to switch potentially hazardous

line-voltage. Qualified service personnel may use the

following information to trouble shoot the system.

The ELV4 uses a normally open single pole relay to control a

heating system. It should open when hotter than its set

temperature and close when cooler than its set temperature.

NOTE: Only the L1-IN/OUT pole is broken during normal

temperature control. The L2-IN/OUT pole is a pass-through

and is always live unless the thermostat's Heat/Off switch is in

the OFF position (which will break both L1 and L2 poles).

For further assistance:

Contact your HVAC service company or our Technical

Assistance Line if not resolved.

Wiring Information and Troubleshooting

This page provides general guidance for your LUX Line-Voltage mechanical thermostat.

For more detailed information please refer to the instructions that came with your

thermostat.

Please make specific note regarding LOW VOLTAGE and LINE VOLTAGE directions. Do

not install LINE VOLTAGE wires to a LOW VOLTAGE control.

Do NOT wire by color of the wire, wire by the LETTER designation to which the wire was

attached on the previous control.

Model

ELV4

Problem

Resolution

120, or 240 VAC connected to

previous control

DO NOT ATTACH LINE VOLTAGE (120/240V)

WIRES TO A LOW VOLTAGE (24V)

THERMOSTAT.

Although its installation is relatively simple, this

thermostat is designed to switch potentially

hazardous line-voltage. If you are unsure of any

aspect of this products application or installation,

please consult with our technical assistance

personnel or other qualified service personnel for

assistance.

Carefully follow the wiring instructions shown in the

ELV4 installation manual for the ELV4 heating

control.

Advanced Troubleshooting

NOTE: Only the L1-IN/OUT pole is broken during

normal temperature control. The L2-IN/OUT pole is

a pass-through and is always live unless the

thermostat's Heat/Off switch is in the OFF position

(which will break both L1 and L2 poles).

For further assistance:

Contact your HVAC service company or our

Technical Assistance Line if not resolved.

Troubleshooting the Display

Problems that may be identified from the display of your programmable thermostat are

listed here with suggested resolutions.

For more detailed information please refer to the instructions that came with your

thermostat.

Model

ELV4

Problem

Resolution

Display will not change

Peel protective plastic label from display.

Display blurred and unreadable

Peel protective plastic label from display.

Press the small round inset RESET button behind

the door of your unit using a small Philips screw

driver. Reconfigure and reprogram.

Time alternates with room temp

This is normal operation which can not be changed.

Blank or fading display

Replace units batteries with fresh AA size

Duracell® or Energizer® alkaline batteries. Be sure

that they are installed with their polarity (+ and -)

correct.

Clean battery contacts with a pencil eraser and pry

out the spring contact slightly to insure a clean, firm

connection.

Press RESET using a small Philips screw driver.

Then reconfigure and reprogram.

Displays "LO BATT",

"REPLACE", or battery symbol

Replace thermostat batteries with fresh AA size

Duracell® or Energizer® alkaline batteries. Be sure

that they are installed with their polarity (+ and -)

correct.

Clean battery contacts with a pencil eraser and pry

out the spring contact slightly to insure a clean, firm

connection.

Displays wrong room

temperature

See Temperature Regulation

Displays wrong day or time

Rotate the Speed Dial® to SET DAY/TIME. The day

will flash, use UP key to correct day. Press NEXT.

The time will flash. Use UP and DOWN keys to go

to correct time. Rotate dial back to RUN.

Shows "888" on display

Press RESET using a small Philips screw driver.

Reconfigure and reprogram.

Shows "OL"

"OL" means Out of Limits. The sensor is reading

outside the thermostats room temperature display

limit of 32°F to 95°F. When the temperature returns

to within these limits the temperature display should

reappear. If actual room temp is not outside these

limits, there may be a malfunction. Press RESET

using a small Philips screw driver. Reconfigure and

reprogram.

Displays "OVERRIDE"

"Override" appears on the display when the set

temp is raised or lowered from the program

temperature. Overrides are terminated at the next

scheduled program period when the unit will revert

to the program temperature and the "Override"

indicator will be extinguished.

Display will not light

Not Applicable. Display is not backlit.

For further assistance:

Contact your HVAC service company or our

Technical Assistance Line if not resolved.

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