Hitachi RAS-07CH4 - BASIC MODE OPERATION DETAILS; OPERATION MODES EXPLANATION

AIR BLOW CHANGE TO "H" FORCILY BY INPUTING "PD CUT 2"
AIR BLOW MAKE A POSSIBLE TO CHANGE AIR BLOW AT TEMP. T
7.
AIR BLOW RETURN TO THE ORIGINAL SETTED TEMP. AT TEMP T
5.
T 9
T 8
T 6
T 7
T 5
T 3
T 4
TEMPERATURE OF INDOOR HEAT
EXCHANGER THERMISTOR
PD CUT 1
PD CUT 2
PD CUT 3
FAN RELAY H
FAN RELAY L
POWER RELAY
STICK RELAY
EXTERNAL FAN RELAY
4-WAY VALVE RELAY
(0.5)
(0.5) (0.5)
(0.5)
(0.5)
(0.5)
(0.5)
(0.5)
1 sec
1 sec
(1 sec)
Fan relay H
Power relay
Stick relay
External fan relay
Reversing valve relay
Timer lamp
Indoor heat exchanger
thermistor temperature
T
1
Low-temperature input
Air-blow mode (A) (B)
HL H
LL L
SS S
Automatic L ❈L
Room temperature
← at the start of →
operation
Cooling The set temper-
ature shall be 27˚C.
Sensor
dehumidi-
fication
The set temper-
ature shall be 2
degrees below the
room temeerature
at the start of
operation.
Heating The temperature
shall be 23˚C +
temperature shift
amount.
27˚C
23˚C
Start/stop button
Fan relay H
Stick relay
2" 2" 2" 2"
+3
+2
+1
-1
-2
-3
Set temperature
Start/stop button
Fan relay H
Fan relay L
Fan relay S
Power relay
Stick relay
External fan relay
Operation lamp
H S L S L H S
S L L
+3
+2
+1
-1
-2
-3
Set temperature
Start/stop button
Fan relay S
Power relay
Stick relay
Operation lamp
S S S
2"
30" 30"
2"
2"
External fan relay
-1
-2
-3
-4
0.66 deg
0.33 deg
Set temperature
Start/stop button
Fan relay S
Power relay
Stick relay
Operation lamp
30"
2"
30"
2"
External fan relay
T"T"
30"
30"
"
T"
30"
30"
T"
30"
30"
+3
+2
+1
-1
-2
-3
-4
(Set temperature)+
(Temperature shift amount)
Start/stop switch
Fan relay H
Fan relay L
Fan relay S
Power relay
Stick relay
External fan relay
4 way valve relay
Heater relay 10"
Pilot lamp
Hot keep lamp
S
S
L
H
S
H
S
L
B
SL
S
L
H
2"
2"
2"
2"
30"
30"
H
10"
Start/stop button
operation lamp
Operation and stop are repeated
independent of timer reservations
Start/stop button
Reservation
Cancel
Operation lamp
Timer lamp
Timer memory
(OFF timer during stop) (Cancel)
(Change of the reservation time)
Start/stop button
Reservation
Cancel
Operation lamp
Timer lamp
Timer memory
(ON timer during operation)
(Cancel)
(Change of the reservation time)
– 41 –
BASIC MODE
Note:
• The min. ON time of the power relay is
3 minutes, and the min. OFF time also
is 3 minutes.
(2) In other modes than “Automatic” Same
as above (but operation is made with
the velocity set at the time of operation
start).
• Operation in the previous
circulation mode
• Operation in “HI” mode
• Operation in “MED” mode
• Operation in “LO” mode
• Only circulation with cut
velocity is executed,
independent of the
thermostat signal.
(1) Strong
•
“LO” and “Stop” are repeated according to the thermostat
signal, independent of the setting.
Automatic
HI
MED
LO
Thermostat operation
H → HI
L → MED
S → LO
• The power relay is
delayed by 2 seconds
from the start of
thermostat operation.
(1) In case of “Automatic” mode
•“HI”, “MED”, or “LO” operation is
executed according to the thermostat
signal. (Refer to “Thermostat operation”.)
• Same as on the left.
• Same as on the left.
• Same as on the left.
(1) When the set temperature is lower than the room temperature
• The min. ON time of the power relay is 3 minutes, and the
min. OFF time also is 3 minutes.
• The indoor fan is not delayed with operation start by start/
stop button ON.
• The indoor fan is delayed by 5 sec with operation start by
thermostat operation.
(2) Set temperature higher than room temperature
Notes:
• Forced operation by start/
stop button ON is executed
even with thermostat OFF.
• The room temperature 30
sec after operation start,
minus 0.66 deg, becomes
the set temperature.
• When the room temperature
is 16°C or lower, 16°C
becomes the set
temperature.
• The other operations are the
same as for (1).
•“HI”, “MED”, “LO”, and “Stop” are repeated according to the thermostat
signal and time.
•“HI”, “MED”, “LO”, and “Stop” are repeated according to the thermostat
signal and time.
•“MED”, “LO”, and “Stop” are repeated according to the thermostat signal
and time.
•
“LO” and “Stop” are repeated according to the thermostat signal and
time.
• The “Automatic” speed mode for
each operation mode is used
independent of the setting. “Week”
at the time of “Sensor
dehumidification”.)
• The operation mode at the start
of operation differs as shown
below according to the room
temperature.
• A shift is not accepted at the time
of operation start.
• There is no switching between
modes after start of operation.
• When the operation is started
again within 20 min. after stop with
the start/stop button, operation
will be executed in the previous
mode.
• The operation details are the
same as for each operation mode.
• The set temperature is set with
the room temperature adjustment
button. Correction by V, ±3˚C is
possible with. At this time, the
operation mode judgement
temperature also is shifted at the
same time. However, correction is
possible only in cooling operation
mode, but not in “Sensor
dehumidification” mode.
Example for “HI” circulation mode
Notes:
• The min. ON time of the power relay is 3 minutes, and the min. OFF time
also is 3 minutes.
• In automatic circulation mode, “HI” in section (B) occurs only the first time.
OFF timer
ON timer
1
Start/stop button,
basic mode
2
Timer
operation
3
Circulation
mode
4
Operation mode
Control function
Fan Cooling Sensor dehumidification Heating Automatic
5
Heating load reduction and Pd cut
6
Reversing valve lock protection
• All relays are stopped by low-
temperature input.
• Not accepted during hot keep,
during compressor stop, during
defrosting and during forced 3
minutes.
• Accepted only during heating
operation.
• Receovery at the time of stop by
low-temperature input is reset
recovery.
• The timer lamp flashes at the time
of stop.