Airwell YCF055, Service Manual

Page: 67 / 113

11-17
CONTROL SYSTEM
SM FBFRPM 1-A.0 GB
11.10 Automatic Cooling or Heating
11.10.1 Automatic Cooling or Heating - General
The AUTO Mode is for models with compressor a nd the WVL-RH only. The WVL- S T,
RC a nd S H units do not work in AUTO Mode.
a . Mode Definition
Mode: AUTO
Temp: S elected desired temper a ture
F a n: Any
Timer: Any
I-FEEL: ON or OFF
b. S witching-temper a ture between Cooling a nd He a ting is S PT
r
3
O
C.
c. When the AUTO Mode is st a rted with S PT +/-0
O
C, the unit will not select Auto
He a t or Auto Cool mode immedi a tely. Inste a d, the unit will be in a tempor a ry FAN
Mode with IFAN oper a ting a t low speed. The proper Auto He a t mode or Auto Cool
will be st a rted whenever the RT re a ches S PT-1
O
C or S PT+1
O
C respectively.
d. For RC & S H units, Mode ch a nge between Auto He a t & Auto Cool Modes is
possible only a fter the COMP h a s been OFF during the l a st T minutes.
Mode Change Time, T
Auto Cool to Auto He a t 3 min
Auto He a t to Auto Cool 4 min
e. For RH a nd WVL-RH units, Mode ch a nge between Auto He a t & Auto Cool Modes
is possible a fter the COMP/HEs h a ve been OFF during the l a st T minutes.
Mode Change Time, T
Auto Cool to Auto He a t COMP off for 3 min
Auto He a t to Auto Cool HEs off for 3 min
f. When unit is ch a nged form Cool/Dry Mode to Auto Mode, the unit will continue to
oper a te in (Auto) Cool Mode until the conditions for switching from Auto Cool to
Auto He a t a re s a tisfied.
S imil a rly, when unit is ch a nged from He a t Mode to Auto Mode, the unit will
continue to oper a te in (Auto) He a t Mode until the conditions for switching from
Auto He a t to Auto Cool a re s a tisfied.