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Hitachi RAF-50NX2 Service Manual page 52

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Room temperature
Temperature set for cooling and
dehumidifying (value set by remote
control: (+) SHIFTC)
Dash period
Fan speed set to "auto"
Fan speed set
to "auto"
Start
Start / stop switch
Thermo judgment
10sec.
Ultra-Hi
Hi
Med
Indoor fan
Lo
Silent
Ultra-Lo
Operation lamp
1min.
Max.
(CMAX)
Rating
(CSTD)
3000
Min.
(WMIN' at Hi, CMIN
in other modes)
0
Reversing valve
3min.
(heating "on" mode)
Lo
Outdoor fan
Notes:
(1) Cool dash is started when the operation is started at fan speed "AUTO" or "Hi" or when the fan speed is changed to "AUTO" or "Hi" during cooling operation, and when the
compressor speed reaches CMAX or higher.
(2) The maximum compressor speed period during cool dash is finished ① when 25 minutes have elapsed after cool dash was started ② when the room temperature reaches
the cooling set temperature -1˚C (including cooling shift) and then becomes lower than the preset temperature by 0.66˚C after the steady speed period, ③ when thermo is
OFF.
(if cool dash finished in the above ① , the compressor does not go through the steady speed period but it starts fuzzy control.)
(3) The thermo OFF temperature during cool dash is cooling set temperature (including cooling shift) -3˚C. After thermo OFF, cool dash is finished and fuzzy control starts.
(4) The compressor minimum ON time and minimum OFF time is 3 minutes.
(5) The time limit for which the maximum compressor speed (CMAX) during normal cooling can be maintained is less than 60 minutes when the room temperature is less than
CLMXTP: it is not provided when the room temperature is CLMXTP or more.
(6) If the fan speed is set to "Med" by remote control, the maximum compressor speed is CJKMAX.
(7) If the fan speed is set to "Lo" or "Silent" by remote control, the maximum compressor speed is CBEMAX.
(8) If the fan speed is set to "Hi" by remote control and both the room temperature and outside temperature (data from the outdoor unit) satisfy the condensation condition in Table
3, the maximum compressor speed is CKYMAX.
(9) While the cooling thermo is OFF, the indoor fan speed is maintained at the preset fan speed.
Basic Cooling Operation
Stop
Start
10sec.
15sec.
Lo
CLMXTP
Stop
Thermo OFF
(Engaged in the set fan speed in cases other than "auto" fan speed)
1min.
15sec.
15sec.
Lo
Table 3 Condensation Condition Criterion Value
Item
Temperature
Room
Condensation
30˚C
temperature
condition (engaged)
Condensation
32˚C
condition (released)
Outdoor
Condensation
32˚C
temperature
condition (engaged)
Condensation
33˚C
condition (released)
– 63 –

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