Hitachi RAC-18SX8 Service Manual page 81

Room temperature
Cooling temperature setting
remote control
temperature setting
＋ Ｓ Ｈ Ｉ Ｆ Ｔ Ｃ
２ ０ min.
Cool dash period
Fan speed
set to AUTO
Operation
START/STOP switch
Thermometer judgment
１ ０"
Super-HI
HI
MED
Indoor unit
LOW
SILENT
Super-LOW
Room two-way valve Open
Operation lamp
60"
Maximum
（ＣＭＡ Ｘ）
Rating
（Ｃ Ｓ Ｔ Ｄ）
（Ｃ Ｓ Ｔ Ｄ2）
STARCPL
Minimum
ＣＭ Ｉ Ｎ Ｈ Ｉ
ＣＭ Ｉ Ｎ
０
ＣＭ Ｉ ＮSZ
Ｌ ｏ
Outdoor unit
１ "
Latch-type reversing valve
Notes: (1) The condition fro entering cool dash mode is when the wind velocity is set to AUTO or "HI" and the product is started, or when, during cooling operation,
the fan speed mode is changed to either AUTO or "HI," and when the compressor speed (P term) due to the temperature difference between the temperature
setting (including the correction shift alone) and room temperature is CMAX or higher.
(2) The condition for the cool dash compressor terminating its maximum running speed is ① 25 minutes after the startup of cool dash, ② when the room temperature reaches
the cooling temperature setting (including the cooling shift) -1℃ and 20 minutes passed after the maximum running speed, and ③ the thermometer is turned off.
(If the cool dash is terminated in ①, the constant-speed period is not executed. Fuzzy control is initiated instead.)
(3) The thermometer-off temperature during cool dash is the cooling temperature setting (including the cooling shift) -3℃. After the thermometer is turned off, the cool dash is
terminated and fuzzy control is initiated.
(4) The minimum ON time of the compressor is 3 minutes, while the minimum OFF time is 3 minutes.
(5) The time limit when the compressor's maximum speed (CMAX) can be maintained during a normal cooling operation (other than cool dash) is within 60 minutes if the room
temperature is 30℃ or less. If the room temperature is more than 30℃, there is no limit.
(6) The fan speed of the remote control is set to "MED," the compressor maximum speed is CJKMAX.
(7) If the fan speed of the remote control is set to "LOW", the compressor's maximum speed is CBEMAX.
(8) If the fan speed of the remote control is set to "SILENT" or "sleep," the compressor's maximum speed is CSZMAX.
(9) The compressor's maximum speed in powerful operation is CMAX2.
(10) If the room temperature is 25℃ or more and the humidity 57% or more, the compressor's minimum speed is accelerated at increments of 100 min
If the product deviates from the high-temperature, high-humidity conditions, the compressor's minimum speed is decelerated at increments of 50 min
CMINHI. (The cooling humidity is limited.)
(11) While the cooling thermometer is off, the indoor unit produces slight wind.
(12) Some 30 minutes later at a humidity of 65% or less, the cooling rated speed is CSTD2.
Basic mode for cooling
Stop Operation
１ ０ "
60"
１ ５"
Ｌ ｏ
１ "
Ｃ Ｌ Ｍ Ｘ Ｔ Ｐ
Stop
Thermometer
OFF
(If the fan speed is not set to AUTO, the fan speed will reach the setting.)
60"
１ ５" １ ５"
Ｌ ｏ
-1 . The upper limit is 1,400 min -1 .
-1 . The lower limit is
Note:
1. For the constants expressed in uppercase alphabet letters in the figure,
see the data in PWRITE-ZU.
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