– 45 –
Notes:
1. The speed set of rotation for the fan motor in each operation mode are as shown in Table 1.
2. The set room temperatures in the diagram include the shift values in Table 2.
3. See “Damper control theory” for damper control and upper/lower fan operations.
• Same as at left.
• Performs the sleep operation of each operation mode.
Operating mode is judged by room temperature and outdoor temperature.
(1) Judging by outdoor temperature
• Operating mode is judged by outdoor temperature.
Only when the mode is not restricted by this judgment, the judgment by room temperature in the next paragraph
will be performed.
(a) Outdoor temperature
30
°
C : Restricted to cooling
(b) Outdoor temperature
9
°
C : Restricted to heating
(2) Judging by room temperature
Operating mode at start up is judged (initial judgment)
(a) Conditions for judgment (any of the followings)
• When auto operation is started after 1 hour has elapsed since the operation was stopped.
• When auto operation is started after the previous manual mode operation.
• When the operating mode is switched to auto while operating at manual mode.
(b) Judging method
• Room temperature
23
°
C
±
3
°
C : Cooling
• Room temperature < 23
°
C
±
3
°
C : Heating
±
3
°
C is the fine adjustment value from the remote controller.
Judging operating mode change during operation (Continuous judgment)
(a) Conditions for judgment (any of the followings)
• The mode is reviewed at every interval time.
• When auto operation is started again before 1 hour has elapsed since the operation was stopped.
(b) Judging method
• Judge by setting the hysteresis on the final preset temperature.
The final preset temperature is the actually targeted preset temperature which is the sum of the basic preset temperature
and each type of shift value (e.g.
±
3
°
C by remote controller, preset temperature correction value, powerful shift value, etc.).
[Currently cooling]
• Room temperature
Final preset temperature –3
°
C Change to heating
• Room temperature > Final preset temperature –3
°
C Continue cooling
[Currently heating]
• Room temperature
Final preset tempe2
°
C Change to cooling
• Room temperature < Final preset tempe2
°
C Continue heating
Set to “ultra-Lo”, “Lo”, “Med”, “Hi”, “ultra-Hi” or “stop” depending on the room temperature,
time and heat exchange temperature. Set to “stop” if the room temperature is 18˚C in the
“ultra-Lo” mode other than during preheating (cooling is recovered at 18.33˚C).
Set to “ultra-Lo”, “Lo”, “Med”, “Hi”, “ultra-Hi” or “stop” depending on the room temperature, and
time. Set to “stop” if the room temperature is 18˚C in the “ultra-Lo” mode other than during
preheating (cooling is recovered at 18.33˚C).
Set to “ultra-Hi” when the compressor is running at maximum speed during hot dash or when
recovered from defrosting.
Set to “ultra-Lo”, “Lo”, “Med” or “stop” depending on the room temperature and time. Set to
“stop” if the room temperature is 18˚C in the “ultra-Lo” mode other than during preseating
(cooling is recovered at 18.33˚C).
Set to “ultra-Lo”, “Lo”, or “stop” depending on the room temperature and time. Set to “stop” if
the room temperature is 18˚C in the “ultra-Lo” mode other than during preseating (cooling is
recovered at 18.33˚C). The fan speed is controlled by the heat exchanger temperature; the
overload control is executed as in the following diagram:
See page 55.
• Same as at left
• See page 57.
Set to “Hi” in modes other than when the
compressor stops.
Set to “Med” in modes other than when the
compressor stops.
Set to “Lo” in modes other than when the
compressor stops.
See page 53.
• Same as at left
• See page 53.
Set to “ultra-Hi” when the
compressor runs at maximum
speed, and to “Hi” in other modes.
1. Runs at “Hi” until first thermo
off after operation is started.
2. Runs at “Lo” when thermo is
off.
1. The indoor fan also stops when the
compressor is in stop status.
Changes between “Lo” and “Med”
depending on the room temperature.
Changes from “Hi” to “Med” or
“Lo” depending on room
temperature.
Division 1
Division 2
Division 3
Division 4
Lo
Fan speed
Temperature division
Lo
Med
Med
Same as at left.
Same as at left.
See page 49.
• Same as at left
• See page 51.
Operates at “Hi” regardless of the
room temperature.
Operates at “Med” regardless of
the room temperature.
Operates at “Lo” regardless of the
room temperature.
Performs only fan operation at the
set speed regardless of the room
temperature.
• Enters sleep operation after set
as on the left.
• Action during sleep operation
Lo (sleep) operation
Hi
F
an speed mode (indoor f
an)
Med
Lo
Basic operation of
temperature controller
Sleep operation
(with sleep button ON)
When the compressor is running at maximum speed
during hot dash or when recovered from defrosting.
In modes other than
left
42. 66
˚C
37. 66
32. 66
29. 66
Lo
Med
“Med” with overload
“Lo”
KAFON
Heat exchanger temperature
KAFOF
Hi or ultra-HI
(fan speed set
to “auto”)
Heat exchanger
temperature
(Compressor stopped
forcibly for 3 minutes)
Thermo iudgment
Temperature set
for cooling
Compressor
Hi
Med
Lo
Auto
Heating
Cooling
Dehumidifying
(dehumidifying operation by the
function select button only, not including
that engaged by the dehumidify button)
Fan
Operation mode
BASIC M O D E
Basic operation of
start/stop switch
Off-timer
On-timer
Timer functions
Off -> On
On -> Off timer
Auto
Start
Stop
(Off-timer during stop)
(On-timer during operation)
ON
ON
ON
OFF
OFF
OFF
ON
OFF
(Change in reserved time)
(Change in reserved time)
(Off->On timer)
(On->Off timer) (On->Off timer)
during operation)
(Off->On timer)
during stop)
Start
Start/stop switch
Operation tamp
Start/stop switch
Operation tamp
Cancel switch
Cancel switch
Reserve switch
Srart/stop switch
Operation temp
Operation temp
Timer tamp
Timer tamp
Timer memory
Timer memory
Timer memory
Timer lamp
Operation lamp
Cancel switch
Reserve switch
Start/stop switch
Stop
Start/stop switch
Operation lamp
Hi
Hi
Med
Lo
Fa
n
Speed
Med
Lo
Cooling
Heating
Room
-temperature
22
°
C
9
°
C
30
°
C Outdoor
temperature
Cooling
Heating
final preset temperature
Summary of Contents for RAC-65NH5
Page 36: ...CIRCUIT DIAGRAM 37 ...
Page 37: ...CIRCUIT DIAGRAM MODEL RAC 65NH5 39 ...
Page 87: ... 99 SELF DIAGNOSIS LIGHTING MODE ...
Page 89: ... 101 2 Outdoor unit does not operate but receives remote infrared signal ...
Page 91: ... 103 6 Check the main P W B power circuit ...
Page 92: ... 104 CHECKING THE REMOTE CONTROLLER ...
Page 97: ... 109 ...
Page 107: ...HITACHI PM NO 0000E Printed in Malaysia RAK 65NH5 RAC 65NH5 ...
