Friedrich R-410A Temperature High Limit, Temperature Low Limit, M3 – Test Mode Access

Temperature High Limit

Maintenance function 1 is ready to be selected. Press DISPLAY/ENTER to access the function.

User presses or to increment or decrement the upper temperature limit. 99°F is the maximum upper limit. The current stored high limit is displayed when the screen is selected. Press the BACK key to accept the value, and exit the sub-menu to the M1 screen.

Temperature Low Limit

Maintenance funtion 2 is ready to be selected. Press DISPLAY/ENTER to access the fuction

User presses or to increment or decrement the lower temperature limit. 60°F is the minimum lower limit. The current stored lower limit must be displayed when the screen is selected. Press the BACK key to accept the value, and exit the sub-menu to the M2 screen.

M3 – Test Mode Access

Maintenance function 3 is ready to be selected. Press

DISPLAY/ENTER to access the function.

User presses the ▼or ▲key to toggle the Test Mode ON/OFF. Press the BACK key to accept the change and exit the sub-menu to the M3 screen.

This test selects the system mode of operation directly.

The Following functions Can be Tested

1. System Mode: Cool/Heat Pump Compressor, Electric Heat, Fan Only

2. Fan operation and speeds

Test mode Bypasses:

1. Compressor lock out (time delay)

2. All relay switch’s delays

3. All thermistors delay

4. Automatic heat/cool changeover delay

5. System settings

If M3 switch is left ON it will reset to OFF automatcally after 15 minutes of inactivity. 19