Basic heating operation
Note:
(1) Conditions for starting Hot dash operation are as follows. When the operation starts from the “AUTO” or “Hi” fan speed or when the fan speed is changed to “Hi” during heating operation. If the temperature difference between the
room temperature with the compressor rotating at maximum speed and the set temperature is (
#
TWMAX : refer to Table 2) and present room temperature is 10˚C or less, Hot dash will start.
(2) Conditions for releasing Hot dash operation (compressor maximum rottion speed period) are as follows.
1
The limit time for compressor maximum speed operation is exceeded.
2
The room temperature reaches the heating preset temperature (including heating shift value) + SFTDSW.
3
The thermostat is turned OFF. (When Hot dash is released by above
1
, PI control starts without operating fixed speed periods 1 and 2.)
(3) The thermostat OFF temperature during HOT dash operation is heating preset temperature (including heating shift value) + 3˚C, and after the thermostat is turned OFF, Hot dash is finished and the PI control starts.
(4) The minimum ON time of the compressor is 3 minutes, and minimum OFF time is also 3 minutes.
(5) The compressor speeds in the fixed speed perids 1 and 2 after releasing the Hot dash maximum rotation (Wtd1 and Wtd2) are determind as in Table 2 depending on the maximum rotation holding time (
#
td).
(6) The time limit to hold the maximum rotation (WMAX) of the compressor in the normal heating operation (other than Hot dash) is within 60 minutes when the room temperature is 18˚C or more. If the room temperature is less than
18˚C, there is no time limit.
(7) During initial cycle operation, preheating operation, defrosting (including balancing operation after defrosting) or AUTO-FRESH defrosting, the operation lamp will blink at intervals of one second.
(8) Preheating operation is determined as follows; preheating comes on when heat exchanger temperature <YNEOF - 0.66˚C when operation is started with start / stop switch; preheating mode is released when heat exchanger
temperature> YNEOF.
(9) Rotation speed of compressor is limited to the value of Rating for Heating (WSTD) + 2000 / 2 min
-1
or less in “Low” fan operation mode.
(10) In “Super Low” fan operation mode, when room temperature drops below 18˚C, indoor fan operation will stop. When room temperature reaches 18˚C + 0.66˚C, Super Low fan operation will start again. However during preheating
or preheating after defrosting, Super Low fan operation will not stop even if room temperature drops below 18˚C.
Note:
1. Refer to data in Table 1 in page 41 for each constant shown by capitital letters in the diagram.
2. [’ ] means minute and [” ] means second (ex. 30’ , 50”) in the diagram.
650min
-1
1.66˚C
750min
-1
2.00˚C
800min
-1
2.33˚C
850min
-1
2.66˚C
950min
-1
3.00˚C
1000min
-1
3.33˚C
1050min
-1
3.66˚C
1150min
-1
4.00˚C
1200min
-1
4.33˚C
1250min
-1
4.66˚C
1350min
-1
5.00˚C
1400min
-1
5.33˚C
1450min
-1
5.66˚C
1550min
-1
6.00˚C
1600min
-1
6.33˚C
1650min
-1
6.66˚C
2150min
-1
1700min
-1
3150min
-1
2500min
-1
4150min
-1
3300min
-1
Less than 10 minutes
10 minutes to less
than 20 minutes
20 minutes or more
Max. speed (WMAX) –
Min. speed (WMIN)
Preset temp. (including
shift) – Poom temp.
#
td (Hot dash time) Wtd
1
Wtd
2
Table 1 Speed specification during fixed rotation period
Table 2
#
TWMAX
Preset temperature
for heating
"AUTO" fan mode is setting
Start
3’ max.
30’
30’
1’
10’
10’
10’
10’
10’
10’
15’
30’
30’
30’
30’
30’
30’
15’
15’
15’
15’
15’
15’
15’
15’
15’
3’
Preheating released
Controlled by heat exchanger temperature
Start/Stop Switch
Thermostat judgement
Defrost signal
Preheating judgement
Super Hi
Hi
Med
Lo
Super Lo
10’
Indoor fan
Reversing valve
Operation lamp
Outdoor fan
Maximum
Minimum
Rated value
Compressor rotation speed
W t d
1
W t d
2
3 0 0 0
0
(WMAX)
Fixed rotation
period 1
Controlled
by heat
exchanger
temperature
exchanger
temperature
Thermostat
OFF
Thermostat OFF
Thermostat OFF
stop
stop
stop
start
start
Preheating released
Controlled
by heat
exchanger
temperature
Controlled by heat
exchanger temperature
Controlled
by heat
Fixed rotation
period 2
(WSTD)
(WMIN)
(+)SHIFTW
SFTDSW
S t d
– 51 –
