Hitachi UTOPIA RAS-4HVRP2E - Page 101

5 Control System
Standard operation sequence RAS-3HVRC2 and RAS-(4-6)H(V)(R/N)(C/P)2E
SMGB0136 rev.0 - 07/2021
99
5
Heating operation (continued)
I.U. :
O.U. :
:
Indoor Unit
Outdoor Unit
Actuator
3
MC
Operation: OFF
Power to
CH
: OFF
Inverter: OFF
Power to
CMC
: OFF
MIF
Operation: OFF
< 77°F (25°C)
or
< Outdoor Temp. +68°F (+20°C)
Temp. at Top of
Compressor
> 86°F (30°C)
or
> Outdoor Temp. +77°F (+25°C)
Press RUN/STOP
Switch
Power to
Y52C
: OFF
STOP
Power to OU:
OFF
Power to IU: OFF
RUN Indicator: OFF
DRY, Set Fan Speed & Set Temp. Indications: Continuosly ON
LCD Indication: OFF
Power to OU PCB: OFF
IU Air Outlet Temp.
IU Air
Outlet
Temp.
Operation at Slo
Fan Speed
MIF
Operation at
Slo Fan Speed
< 122°F (50°C)
≥122°F (50°C)
Heat Rejection
Operation
Elapsed Time
< 2 min.
Elapsed Time
≥ 2 min.
> 104°F (40°C)
≤104°F (40°C)
Reset of Timer for Defrost Operation
Power to IU PCB: OFF
MIF
Operation: OFF
Power to
CH
: ON
Power to
CH
: OFF