Heat Controller SMA Service Manual page 17

Owner's Manual
Function Buttons (continued)
ION and FOLLOW buttons
are optional functions.
Remote ContRolleR
ECONOMY Button (Sleep Mode)
to maintain the most comfortable temperature
TIMER OFF Button
Press this recessed button to lock all current set-
tings. Use the LOCK mode when you want to
prevent settings from being changed accidentally.
Press the LOCK button again to cancel the LOCK
function. A key symbol will appear on the remote
controller display when the lock function is activated.
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