Aquacal LTM0266 - Manual (Page 32)

Page 26
STEPS EXPLANATION
Press “Up” or “Down” button
once to display the current
temperature value of the defrost
sensor.
Compare displayed defrost sensor temperature on controller against reading
obtained by clamp-on device.

If the defrost temperatures is within 1°F, no calibration is necessary.

If the temperatures differ by 2° to 3°F, calibration is necessary, proceed to
next step.
Press “Up” or “Down” button to
match temperature reading
obtained by clamp-on device.

The controller can be adjusted to +/- 10°F from the displayed temperature.
Please note - offset calibrations greater than 3°F should be avoided. Such
large offsets generally indicate problems with the method of defrost
temperature measurement, a defrost sensor not properly attached to the
suction line, or other equipment issues. Do NOT attempt to mask such issues
through offset calibration.
Wait 15 seconds to allow heat
pump to exit programming
mode.
Front panel can be re-attached. Calibration is complete.
Set system controls to desired
mode of operation.
If needed, see “Setting Operating Mode” on page 3.
Adjusting Dead-Band Differential
The dead-band differential determines the number of degrees the water temperature must rise or fall below the set
point before calling for heating or cooling. The installer should not adjust sensor calibration or dead-band values
unless instructed by an AquaCal AutoPilot Technician.
Enter Service Menu If needed, see “Entering Service Menu” in this chart.
Press “Pool / Spa” button until
“dBS” is displayed for Spa or
“dBP” is displayed for Pool.
This is the entrance point for the Dead-band Differential adjustment menu.
Press “Up” button once to
display current setting.
Press “Up” or “Down” button to
adjust differential in 1-degree
increments.
The differential is adjustable in 1-degree increments from 1 to 5 degrees
Fahrenheit.
1 degree = .5 degree above or .5 degrees below water temperature.
2 degree = 1 degree above or 1 degree below water temperature.
3 degree = 1.5 degree above or 1.5 degrees below water temperature, etc.
Wait 15 seconds to allow heat
pump to exit programming
mode.
Calibration is complete.
Resetting Heat Pump ("Back Door” Entry)
The factory "Back Door Entry" will reset the service lock code back to the factory setting “50”.
Simultaneously Press “Pool /
Spa” button and "Up” button
until display shows “888”.
Release buttons.
CAUTION - Using this option will RESET ALL SETTINGS TO THE FACTORY
DEFAULTS.
This includes external controller configuration and will require re-entry of any site
condition settings. See “Microprocessor Default Parameters” for a complete list
of factory default parameters on page 27.
Table 12