Heatcraft Refrigeration Products H-IM-79E manual Programming & Reviewing

Programming & Reviewing

MONITOR

Use the “MONITOR” button to review these items:

SUP - Superheat (°F/°C)

ESP - Expansion valve steps (0 to 255 steps)

SCt - Suction temperature (°F/°C)

SSt - Saturated Suction temperature (°F/°C)

SCP - Suction pressure at Evaporator (PSIG/HG)

Odt - Outdoor temperature (°F/°C)

dFt - Defrost sensor temperature (°F/°C)

dFS - Time left until next defrost (hours) (on version 1.8 boards)

dFE - Last Defrost Elapsed time (minutes)

AC - Board Voltage

SPt - Spare Temperature reading

Use this button to “FORCE DEFROST” To force a defrost , press the “FORCE DEFROST” button. The system will pumpdown and shut off the compressor. The heaters are then turned on. The display will show “dEF” and room temp.

FORCE

DEFROST

Use this button to “RESET TIME” Pressing this button will reset the time clock in the microprocessor to zero. At initial power up, pressing this button will bypass the “four minute” hold-off and the system will start

immediately after the expansion valve opens. This display will show “dLy”.

RESET

TIME

Use this button to “FORCE SERVICE”

Pressing this button TWICE will cause the system to

pumpdown and the compressor to shut off. The system will remain off until the “CLEAR” button is pressed. While in the “FORCE SERVICE”, the LED display will only show “SEr”.

FORCE

SERVICE

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