Hitachi RAC-25JX4, Service Manual

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Notes:
(1) The defrosting inhibit period is set as shown in the diagram below. When defrosting has finished once, the
inhibit period is newly set, based on the outdoor temperature when the compressor was started. During this
period, the defrost signal is not accepted.
(2) If the difference between the room and outdoor temperature is large when defrosting is finished, the
maximum compressor speed (WMAX) or (WMAX2) can be continued for 120 minutes maximum.
(3) The defrosting period is 20 minutes maximum.
(4) When operation is stopped during defrosting, it is switched to auto refresh defrosting.
(5) Auto refresh defrosting cannot be engaged within 15 minutes after operation is started or defrosting is
finished.
・
Sleep button
Operation lamp
Remote control (Sleep)
Timer lamp
Indoor fan
Hi
Med
Lo
Silent
Sleep Lo
Outdoor fan
Horizontal air
deflector
Shut
Horizontal
Facing down
Compressor
speed
Indoor fan
Outdoor fan
Operation lamp
Hi
Med
Lo
Silent
Ultra-Lo
Preheating judgment
Defrost signal
Start/Stop button
Deceleration
period
Reverse cycle period Reverse cycle period
20min. Max.
3min. Max.
20min. Max.
２
℃
Reversing valve
(Cooling "ON" mode)
More than defrosting inhibiting period
Fan speed
set to ÒHiÓ
Preheating cancelled Preheating cancelled Preheating cancelled Preheating cancelled
Preheating
15min. and above
Auto fresh defrosting
Stop
Hi or Lo Hi or Lo
15sec.
10sec.
1sec.
13sec.
30sec.
1sec.
3min.
1min.
60sec.
60sec.
30sec. 30sec.
Room temperature
1hr
3.5hr
3hr
1hr 0.5hr
Set to continuous operation
One-more timer inhibited
One-more timer monitoring
Max. 4hrs
S
S
Lo
See basic operation
See basic operation
Notes:
(1) The sleep operation starts when the sleep button is pressed.
(2) When the sleep button is set, the maximum compressor speed is limited to WSZMAX and the indoor fan is set to
ÒSleep LoÓ (FWSOY).
(3) If operation mode is changed during sleep operation, the operation is changed from the time the change was made and
the sleep control starts.
(4) The indoor fan speed does not change even when the fan speed mode is changed.
(5) If defrosting is set during sleep operation, defrosting is performed and the sleep operation is resumed when the
defrosting is finished.
(6) When the operation is stopped while the sleep operation is being performed, the set temperature at the time the
operation is stopped is retained and the time count will be continued.
(7) When the set time is changed while the sleep operation is being performed, all data including set temperature and time
are cleared and the operation newly starts.
(8) If the sleep operation is cancelled by the cancel button or sleep button, all data are cleared.
(9) There is no shift in the set temperature by elapse of time.
(10) One-more timer operation is not performed in case of time setting reservation of 1, 2 or 3 hours.