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allowed to turn on for that length of time on powerup.
Setting each unit to a different delay allows you to soft
start your system, and thus prevent this peak. This func-
tion also occurs when an occupied period begins to
prevent all units from starting at the same time.
Checkout & Troubleshooting
CHECKOUT
1. Be sure to check and verify all wiring before powering
the SZ1063 and SZ1064.
NOTE: The fan has a minimum on and off time of 30
seconds. The auxiliary relay when set for heating or
cooling has a minimum on and off time of 2 minutes.
NOTE: The SZ1063 does not show the day or time.
2. Turn power on. The thermostat will display a momen-
tary screen with the model number, and then the main
* SZ1064 *
TCS V2.0 (c)
MON FAN:MED
12:00AM
monitoring screen with the time, day, fan speed and cur-
rent temperature.
3. Press the PROGRAM SETUP button until you
reach screen #13 and set the System Mode to AUTO.
Continue on until you reach screen #14 and set the
Occupied Fan Mode to AUTO. Go to screen #22
which allows you to set the occupant setpoint adjust-
ment limits. Change this to +/-20 °F (11.1 °C). Press
the PROGRAM SETUP button once more to store the
change. Then press the FAN OFF button once to exit
the programming.
LIMIT SETPOINT
ADJUST +/-: 5F
4. Verify that the thermostat is operating in the occupied
mode by making sure that the top LED is lit. If not, press
the OVERRIDE button. The LED should light up.
5. Take note of the current temperature reading. Press
the WARMER (up) button. The setpoint adjustment
screen should now be showing. Press the WARMER
button until the heating setpoint is greater than the cur-
rent temperature by at least five degrees. The fan will
come on. The auxiliary relay if set to heating will come
on after 30 seconds.
6. Press the cooler (down) button until the heating set-
point is one degree less than the current temperature.
The heating stage will sequence off. The fan will turn off
2800 LAURA LANE • MIDDLETON, WI 53562 • (800) 288-9383 • FAX (608) 836-9044 • www.tcsbasys.com
72F
2 minutes afterwards.
7. Press the cooler button until the cooling setpoint
is less than the current temperature by at least five
degrees. The fan will come on. The auxiliary relay if set
to cooling will come on after 30 seconds.
8. Press the warmer button until the cooling setpoint is
greater than the current temperature by one degree. The
cooling stage will sequence off. The fan will turn off 2
minutes afterwards.
9. For a heating or cooling analog output: Take note of
the room (and discharge) air temperatures. If the analog
output is set for Cooling, press the Cooler button until
the cooling setpoint is less than the current room tem-
perature by at least 5°. The cooling device should start
operating. If the analog output is set for Heating, press
the Warmer button until the heating setpoint is greater
than the current room temperature by at least 5°. The
heating device should start operating.
10. Go back to programming step #22 and set the set-
point adjust limit back to the desired value. Make any
other changes in programming, clock, and schedule. Set
the fan and system modes to their desired settings.
11. If using remote sensor(s), verify that the reading
is correct. If not, see Wrong Temperature Display in
Troubleshooting section.
TROUBLESHOOTING
No Display
Check for 24 VAC on terminals "+24" and "-24". Check
the cable connecting the cover to the base for a good
connection.
Fan Does Not Come On
The fan is on whenever the fan LED is on. If the fan
should be on, but the fan LED is off, check the occupied
and unoccupied fan mode in programming. If the Fan
Status is OFF, press the Low, Medium or High button. If
the fan is off but the fan LED is on, check wiring. Short
terminals "R" to "GL", "GM" or "GH" and see if the fan
comes on. This is a check for a mechanical relay failure.
Heating or Cooling Does Not Come On
Heating is on whenever the heating LED is on, and
cooling is on whenever the cooling LED is on. If heating
or cooling should be on but the heating or cooling LED
is off, check the fan and system modes. Also, check the
heating and cooling setpoints, offsets and differentials,
and the room temperature to be sure heating or cooling
should be on.
Wrong Temperature Display
Initially, verify the wiring connections to check for problems
(poor connections, opens, or shorts). If the temperature is
at a minimum or maximum reading, check that the sensor
dipswitch positions are correct as shown in the Setup sec-
tion of this document. Also, verify the resistance reading for
9
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