When power is fi rst applied to control or after power outage
there is three (3) minute delay before compressor or
electric heat will energize. Protects unit from short cycling
due to loss of power.
Pointing The Remote
Point remote toward cassette’s infrared receiver window
when entering commands. Cassette responds with
beep indicating it has successfully received transmitted
information. See Figure 38, Page 29 .
Synchronization
Occasions when remote and cassette’s main control board
mode synchronization or are not in the same mode may
happen if commands are entered into remote when not
pointed at cassette.
To re-synchronize:
• Enter any command into remote while pointing at
cassette’s infrared receiver window.
• Alternatively, hold POWER/SEND button two seconds.
All optional remote’s settings are transmitted to
cassette. Cassette responds with beep, indicating it
received transmitted information.
Temperature Indication
Room temperature displayed on remote is temperature at
remote.
Microprocessor control located in cassette does not read
remote’s temperature — it uses sensor located in return air
of cassette.
Warming or cooling of remote alone does not effect opera-
tion of Cassette. Cassette will react to its local tempera-
ture sensing element and setpoint selected and transmitted
by remote.
Transmission Limits
Remote has transmission distance approximately 25-30
feet when perpendicular to face of Cassette. Reception
distance varies with angle of transmission if not
perpendicular. Reception distance may also vary depending
on room lighting.
Hibernate Mode
Remote enters hibernate mode and display goes dark if
there is no activity on remote for ten minutes. Pressing any
button awakens remote while in hibernate mode. Remote
returns to mode it was in prior to entering hibernate mode.
Power
Pressing POWER button momentarily switches unit either
on or off.
1.
OFF mode, LCD displays time of day and day of week.
2.
ON mode, LCD displays room temperature, mode of
operation Cooling, Heating, Auto (Auto changeover),
Dry or Fan mode.
3.
ON mode, setpoint temperature displays momentarily
with push of any button except POWER button.
4.
Remote transmits all infrared hand held controller
information to cassette when POWER is held down for
two (2) seconds.
Mode
Heating, Auto Changeover (Auto) or Dry modes do not
display if Heat Source is set to OFF in Confi guration mode.
MODE button allows selection of mode of operation — Cool-
ing, Heating, Auto Changeover (ACO), Dry or Fan mode.
Fan mode either HIGH, MEDIUM or LOW appears on LCD.
Fan Operation
Indoor unit utilizes three-speed motor with four operational
fan modes — High, Medium, Low, and Auto.
FAN button allows selection of desired fan speeds in all
modes except Dry mode.
Dry mode, fan operates constantly at low speed. LCD
indicates fan speed selection.
High, Medium
,
and Low are constant fan settings. Fan
operates continuously, regardless of setpoint or room
temperatures.
Auto fan mode is for auto ramping of fan speeds.
1.
Auto fan mode can only be selected if unit is in Heating,
Cooling or Auto Changeover modes.
2.
Auto fan mode, speed is determined by
microprocessor.
a.
Speed adjustment is made according to room and
setpoint temperatures.
b.
Fan switches to High speed when room temperature
deviates by more than two degrees from setpoint.
c.
Fan switches to Low speed if deviation is one degree
or less.
Louver Operation — CAHV 18-24
Louver can be set to oscillate during fan operation or open
to fi xed setting.
“Lou” is displayed for two seconds along with “ON or “OFF”
to indicate louver setting has been changed when LOUVER
is pressed.
HAND HELD CONTROLLER OPERATION
35
