Master Bilt IM-23GB - Manual (Page 8)

8
OPERATION
Fan The fan will run constantly except when a defrost is initiated, or when the evaporator temp is above
35
o
F. When in defrost mode the fan is off until the end of the defrost and the 2 minute drip time has
passed. There is 2 minutes delay after a defrost before the fan comes on. The difference of the evaporator
and room temperature of more than 9
o
F will override the fan delay. FAN LED indicator is flashing during 2
minutes drip period.
Defrost The control uses time defrosts with four defrost per day for oil return safety. The defrost timer
begins counting on power up. For example, if a defrost is desired at 12 am, 6 am, 12m, and 6 pm then
power up the unit at any of those four times.
MANUAL DEFROST
1. Push this DEFROST ” UP/DEFROST” key for more than 5 seconds and a manual defrost will
start, if the conditions are correct, the led DEF will light up and the instrument will carry out a
defrosting cycle.
2. While in defrost, push and hold the DEFROST key for more than 5 seconds and the
controller will end the defrost cycle. The controller will then enter drip mode for 2 minutes. The DEF
led is flashing in drip mode.
HOW TO CHANGE SET POINTS
1. Press the P until sp-1 is displayed.
2. Push
UP ▲ or DOWN▼ arrows to change the value.
3. To Exit: Press SET + UP ▲ or wait 20 seconds 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 20
°F at the factory.
NOTE 3: If power is turned off to the unit, the set point returns to factory set value.