C&H GKH18K3BI, Owner'S Manual

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the outdoor unit will be frosted resulting in low efficiency
of heating, in which case, the controller will automatically
start to defrost with DEFROST displayed.
Note: No heating for cooling-only unit and auto mode will
be shielded after setting energy saving.
6)
Timer Setting (Fig.7, 8, 9)
Timer function in this wired controller connected
with weekly timer is invalid and wired controller will be
controlled by weekly timer.
Either in ON status or OFF status of the unit press
TIMER button into timing setting, and then press
▲ or
▼button to set timing(Fig.7),set time(Fig.8) and
delete timing
(Fig.9). At last, press TIMER to set it.
Fig.7
Fig.8
Fig.9