IMS MM500 Instruction Manual page 20

Keypad Functions:
Button 1 (Up Arrow):
Button 2 (Set):
Button 3 (Down Arrow):
*Note: Password is used to access additional parameters in the controller. This should
only be accessed by a certified technician.
Changing the "set-point":
To change the "set-point", hold the "Set" key (see Keypad Functions) for 1 second until
you see the letters 'st'. Then press the set key again to access the set-point. Use the "Up
Arrow" and "Down Arrow" keys to change the value. Once to the desired value, press
the "Set" key again to store the value.
*Note: The set-point can be set between 50ºF and 90 ºF
Changing the "set-point differential":
To change the "set-point differential", hold the "Set" key (see Keypad Functions) for 3
seconds until you see the letters 'Pw'. The use the arrow keys to scroll through the
menus until you see the letters 'rd'. Then press the set key again to access the set-point
differential. Use the "Up Arrow" and "Down Arrow" keys to change the value. Once to
the desired value, press the "Set" key again to store the value.
*Note: The set-point differential should be set between 3ºF and 10 ºF
Figure 1
Pressing this button raises the selected value.
Pressing this button for 1 second allows access to the "set-
point" of the chiller.
Pressing this button for 3 seconds will allow access to the
"set-point differential", "password" and "ºC/ ºF" of the
chiller.
Pressing this button lowers the selected value.