Haier YR-E17A Operation & Installation Manual page 24

Wired controller
Operation
(2) If the communication address flashes, you can change 
it with
or
key, and the adjustment range is 0~3F. After
adjustment, you need to press MENU key to confirm changes.
If the communication address is static displayed, it cannot be
changed.
Child lock
(1) Press 
and MENU keys for 5 seconds to set / cancel child
lock. If child lock function is set,
icon will be displayed in
the main interface. In the state of child lock, all keys are not
available.
(2) When controlling Fresh Air unit, the controller's main 
interface will not display
and
keys in normal state. If you
want to set child lock function, please press area of
key
first, and then press MENU key together for 5 seconds to set / 
cancel child lock.
Static Pressure (only valid for part of models) 
(1) When the controller is turned on, press FAN and MENU 
keys for 5 seconds to enter static pressure interface. The
parameter of static pressure is displayed in the upper left
corner. And you can use
or
key to adjust it. After
adjustment, you need press MENU key to confirm changes.
The unit number is displayed in the lower right corner.
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