Electronic Refrigeration Control; Operations; Manual Defrost; Changing The Set Point - Master Bilt IHC-27 Installation & Operation Manual

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MASTER-BILT

ELECTRONIC REFRIGERATION CONTROL

OPERATION
Compressor When power is first turned on to the control, the LED indicator under COMP on the display starts blinking. The
cabinet will enter a defrost at start-up. The compressor(s) and the Defrost icon will be on. The defrost will last 6 minutes followed
by a 3 minutes dripping time. The compressor(s) icons will then be on if the temperature is above set point +7°F the evaporator
fan(s) Icon will then be on after a 2 minutes delay. After the initial defrost and between two consecutive defrosts the compressor(s)
and evaporator fan(s) icon will be on when the cabinet temperature is above set point + 7°F until the temperature drops to the set
point. The compressor(s) and fan(s) icon will then be of until the cabinet temperature rises above set point +7°F. A defrost with the
same timing sequence as the initial defrost will occur every 8 hours.
Display Lay-out
Fan – If a door is opened when the evaporator fan(s) is on, the fan(s) will be turned off for a duration of 1 minute. After this 1
minute delay the fan will be turned back on and the door open alarm DA will blink on the controller display and the alarm sounds
.
Defrost - The control uses timed defrost every 8 hours. Scheduled defrost can be bypassed by using the manual defrost feature
of the controller. During scheduled or manual defrost the display will show dEF and the LED indicator under dF is on.

MANUAL DEFROST

1. Push this DEFROST
2. While in defrost, Push and hold the DEFROST
defrost cycle. The controller will then immediately start the compressor and evaporator fan.
HOW TO SEE THE SETPOINT (Box temperature cut-out)
1.
point value;
2. Push and immediately release the SET key or wait for 5 seconds to display the probe value
(actual box temperature) again.
HOW TO CHANGE THE SETPOINT
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.
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 factory set at a recommended –25F.
3/20 Rev. A 57-02699
key for more than 2 seconds and a manual defrost will start.
Push and immediately release the SET key: the display will show the Set
key for more than 5 seconds and the controller will end the
LIST OF PARAMETERS
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