Table of Contents
Advertisement
T8141A ELECTRONIC HEAT PUMP THERMOSTATS
TROUBLESHOOTING
IF. . .
Heating will not come on.
Cooling will not come on.
The thermostat current setting does not
match the display temperature to within ± 1°.
Incorrect room temperature showing
on thermostat display.
Home and Building Control
Honeywell Inc.
Honeywell Plaza
P.O. Box 524
Minneapolis MN 55408-0524
Honeywell Latin American Division
Miami Lakes Headquarters
14505 Commerce Way Suite 500
Miami Lakes FL 33016
68-0169—1
68-0169—1
J. S.
Rev. 11-96
THEN. . .
1. Check:
• That switch on thermostat is set to HEAT.
• The system fuse or circuit breaker and replace or reset if necessary.
• For correct wiring and good connections.
• That temperature setting is higher than current room temperature.
2. System has a built-in time delay on heating. Allow five to ten minutes for the
furnace to heat up and the fan to come on before checking for heat at the
register.
3. If heat still does not come on, check EM. HEAT indicator.
• If fault indicator is connected to terminal L, and the EM. HEAT indicator is
on, contact the Original Equipment Manufacturer or your HVAC dealer.
• If EM. HEAT indicator is off, contact Honeywell Customer Assistance at
1-800-468-1502.
1. Check:
• That switch on thermostat is set to COOL.
• The system fuse or circuit breaker and replace or reset if necessary.
• For correct wiring and good connections.
• That temperature setting is lower than current room temperature.
2. System has a built-in time delay on cooling. Allow five to ten minutes after
changing the setting before the air conditioner starts.
3. If cooling still does not come on, check EM. HEAT indicator.
• If EM. HEAT indicator is on, move system switch from COOL to OFF.
After ten minutes, return the switch to the COOL position. If the air
conditioner comes on, compressor could have reached its high limit
temperature protection and shut down.
• If cooling still does not start, and the fault indicator is connected to
terminal L, and the EM. HEAT indicator is on, contact the Original
Equipment Manufacturer or your HVAC dealer.
• If the EM. HEAT indicator is off, contact Honeywell Customer Assistance
at 1-800-468-1502.
• Check that the wiring hole in the wall behind the wallplate was plugged
with insulation to prevent drafts that could adversely affect thermostat
operation.
• Be aware that it is normal for the current setting and display temperature
to differ on occasion.
• During recovery from setback or setup, setting and display temperatures
can differ for up to 30 minutes after recovery period.
• Make sure hole behind thermostat is plugged with insulation to help
prevent drafts from adversely affecting thermostat operation.
Home and Building Control
Honeywell Limited-Honeywell Limitée
155 Gordon Baker Road
North York, Ontario
M2H 2C9
Honeywell Europe S.A.
3 Avenue du Bourget
B-1140 Brussels Belgium
Printed in U.S.A.
Honeywell Asia Pacific Inc.
Room 3213-3225
Sun Hung Kai Centre
No. 30 Harbour Road
Wanchai
Hong Kong
8
Helping You Control Your World
®
Advertisement
Table of Contents
