Hitachi UTOPIA RAS-4HVRP2E - Dry Operation

5 Control System
Standard operation sequence RAS-3HVRC2 and RAS-(4-6)H(V)(R/N)(C/P)2E
SMGB0136 rev.0 - 07/2021
96
5.5.2 Dry operation
I.U. :
O.U. :
:
< 86°F (30°C) or < Outdoor Temp. 77°F (25°C)
≥ 86°F (30°C) or ≥ Outdoor Temp. 77°F (25°C)
Indoor Unit
Outdoor Unit
Actuator
Power to OU: ON
Power to OU PCB:
ON
Temp. at Top of
Compressor
Power to
CH
: ON
Power to
CH
: OFF
Power to IU: ON
Power to IU PCB:
ON
Auto-Louver
0 Reset
only for indoor unit
with auto-louver
Start of Communication between
OU and IU
Start of Communication between IU
and Wired Controller
Set Operation
Mode to "DRY"
Power to
YH2
in IU: OFF
ON
(Lower than
Activation Level)
OFF
(Higher than
Activation Level)
Power to
YH2
in
IU: OFF
MD
Operation: ON
for unit with drain pump
"DRY" Indication
Indication of Set Temp.
Press
Temp. Setting
Switch
Press RUN/STOP
Switch
Power to
YH2
for 20 sec.
▲ Switch: To increase Set Temp.
▼ Switch: To decrease Set Temp.
RUN Indicator: ON
IU Air Inlet Temp.
Outdoor Temp.
Power to
Y52C
: ON
≥ Set Temp.
< Set Temp.
MIF
Operation at Low Fan Speed
Power to
CMC
: ON
Elapsed Time:
1sec.
Yes
No
MOF
Operation: ON
Press
AUTO-LOUVER
Switch
< Alternately >
Start of
Auto-Louver
Stop of
Auto-Louver
only for Decorative
Panel or Indoor Unit
with Auto-Louver
to 2
Power to
MC
: ON
Power to
MIF
: OFF
Elapsed Time:
6 min.
Yes
No
Elapsed Time:
6 min.
No
Yes
MIF
Operation at Low Fan Speed
Dry Operation
FS
Individual: ≥ 23°F (-5°C)
Simultaneous: ≥ 5°F(-15°C)
Individual: < 23°F (-5°C)
Simultaneous: < 5°F(-15°C)