Friedrich KUHL R-410A Service Manual page 20

Temperature High Limit
Maintenance function 1 is ready to be selected. Press DISPLAY/ENTER to access
the function.
User presses or
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
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.
to increment or decrement the upper temperature limit. 99°F
to increment or decrement the lower temperature limit. 60°F is the
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