Controller Operation 7-3
Entering Setpoint Temperature
The setpoint temperature of the unit can be easily changed. To adjust the setpoint, begin from the Standard Display:
1. Multi-Temp MT µP-IV: Press the SELECT key to scroll to the Standard Display of the zone you want to enter a new setpoint.
• ZONE 1, ZONE 2 and ZONE 3 icons in display identify which Standard Display you are currently viewing.
2. With the Standard Display on the controller, press the UP or DOWN arrow key until the desired setpoint temperature shows
in the lower display.
3. When the correct setpoint shows in the lower display, press the ENTER key to load the new setpoint in the microprocessor
memory.
• “LOAD” will appear in the lower display for a few seconds.
• The new setpoint will then appear. Multi-Temp MT µP-IV: Check the setpoint shown in the display against the zone shown
in the display to be certain that the setpoint was changed for the correct zone.
• If the ENTER key is not pressed, the setpoint will NOT change and the display will return to the Standard Display in about
10 seconds.
Selecting CYCLE-SENTRY or Continuous Run Mode (Multi-Temp MT µP-IV and µP-V
ONLY)
WARNING: With the On/Off switch (or Zone 1 On/Off switch) in ON position, the unit may start at any time without prior
warning.
1. With the Standard Display on the controller, press and release the SELECT key until CYCLS appears in the upper display.
2. Press the UP or DOWN arrow key until the desired setting shows in the lower display.
• Yes = CYCLE-SENTRY mode
• No = Continuous Run mode
3. When the correct setting shows in the lower display, press the ENTER key to load the new setting in the controller memory.
• “LOAD” will appear in the lower display for a few seconds.
• CYCLE-SENTRY icon appears in the display when CYCLE-SENTRY mode is selected.
• If the ENTER key is not pressed, the operating mode will NOT change and the display will return to the standard display
in about 10 seconds.
Initiating Manual Defrost
1. With the Standard Display on the controller, press and release the SELECT key until dEF appears in the upper display for the
zone you want to place in Defrost mode.
• ZONE 1, ZONE 2 and ZONE 3 icons in display identify which zone prompt (dEF) you are currently viewing.
2. When the correct zone dEF prompt shows in the lower display, press the ENTER key to place zone you selected in the Defrost
mode.
NOTE: The Zone On/Off switch must be ON and the evaporator coil temperature must be below 7 C to initiate a Defrost cycle
in the zone you select.
• “LOAD” will appear in the lower display for a few seconds.
• The defrost symbol will appear in the display when the a zone enters defrost.
• Defrost will terminate automatically.
• If the ENTER key is not pressed, the operating mode will NOT change and the display will return to the Standard Display
in about 10 seconds.
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