Hitachi RAS-EH36PHLAE Service Manual page 60

Reversing valve defrosting
Over efrosting inhibit perio
d d
Fan spee
d
Start/Stop button
set to "Hi"
Defrost signal
Preheating released
Preheating ju d gment
Hi
-L---_j•-----�------L-J__LJl_ ___ L __________
L
M e d
� � �
In d oor fan
Lo
Ultra-Lo
N
15
Hi or Lo
Out d oor fan
Operation lamp
Reversing valve(heating
"on" mo e)
d
Reverse cycle perio
Deceleration
perio
d 20' MAX.
DFMAX_STD
0
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 20minutes 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.
15' or more
Auto fresh defrosting
Stop
Preheating released
Preheatin
Reverse cycle perio
d
DEFCMP _OFFA
3' AX. 20' AX.
M M
Setting Defrosting Inhibit Period
� DFTIM_OTP 10
--------�--�---�--
I
_J __
-10
Notes:
The first inhibit time after operation start is set to DFTIM_FST.
(1)
From the second time onwards, the inhibit time is set according to the time required for
(2)
defrosting.
Reverse cycle operation time � [DEFCOL] : DEFTIM_COL is set.
Reverse cycle operation time < [DEFCOL] : The time corresponding to outdoor tempera­
d
ture is set.
60
DFTIM_OT P5
I I
DFTIM_OT PO
I
- - _1 - - - � - - � - - -:- - -
I
I I
' I
I I
I
I I
o ·c Outdoor temperature
°
- 5
C