Master Bilt TAF-27 - Page 10

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1. Push the SET key for more than 2 seconds to change the Set point value;
2. The value of the set point will be displayed and the LED under COMP starts blinking;
3. To change the Set value push the UP ▲ or DOWN▼ arrows within 10s.
To memorize the new set point value push the SET key again or wait 10s.
HOW TO CHANGE a parameter value
1. Enter the Programming mode by pressing the SET and DOWN ▼ keys for 3 seconds
(LEDs under DEF and COMP start blinking).
2. Select the required parameter by pushing
the UP ▲ or DOWN▼ arrows
3. Press the “SET” key to display its value (now only the COMP LED is blinking)
4. Use “UP” or “DOWN” to change its value
5. To exit: Press SET + UP ▲ or wait 15s without pressing a key.
NOTE 1: The set value is stored even when the procedure is exited by waiting the time-out to expire.
NOTE 2: Master-Bilt’s SETPOINT is set at a recommended –10°F at the factory for low temperature(LT) and
+35
o
F for medium temperature(MT) application.
NOTE 3: To scroll down the parameters without changing them, press the DOWN button.
LIST OF PARAMETERS
Here is a list of the parameters the value of which can be changed in the programming mode, as
well as their ranges.
Parameter Display
Symbol
Description Range Master-Bilt’s
Setting
Minimum
temperature alarm
limit
ALL
When this temperature is
reached the alarm is enabled
after a delay
-58 to 230°F -40
Maximum
temperature alarm
limit
ALU
When this temperature is
reached the alarm is enabled
after a delay
-58 to 230°F 15
ALARM SIGNALS
Message Cause Outputs
“P1”
Room probe failure Compressor output according to par. “Con” and “COF”
“P2”
Evaporator probe failure Defrost end is timed
“HA”
Maximum temperature alarm Outputs unchanged.
“LA”
Minimum temperature alarm Outputs unchanged.
NOTE:
Probe alarms “P1” and “P2” start some seconds after the fault in the related probe; they
automatically stop some seconds after the probe restarts normal operation. Check
connections before replacing the probe.
Temperature alarms “HA” and “LA” automatically stop as soon as the thermostat
temperature returns to normal values and when defrost starts.