Heating Operation - Hitachi RAS-5HVRNM1E Service Manual

5 Control System

Heating operation

Power to
O.U.: ON
Power to
I.U.: ON
Setting at
HEAT
Pressing
FAN switch
Pressing
TEMP.
switch
Pressing
RUN/STOP
switch
< 4 hours
After
(* < 2 hours)
power
supply
≥ 4 hours
(* ≥ 2 hours)
HEATING
operation
to 1
Continues in the next page.
132
SMGB0060 rev. 1- 12/2010
Power to PCB in
O.U.: ON
Auto-louver 0
Power to PCB in
I.U.: ON
Air
over switch
Switch: increasing set temp.
Switch: decreasing set temp.
Power to YH2 for
A
20 sec.
Indication of unit
stoppage cause (d1-22)
< 50 ºC
Temp.
(* < 30 ºC)
on the top of
comp.
≥ 50 ºC
(* ≥ 30 ºC)
A
Lower than
I.U.
set temp.
Power to
air
intake
Y52C : ON
Higher than set
temp. +2 ºC
MIF operation
After 30 sec.
at slow speed
Operation at
slow fan speed
Operation at
low fan speed
I.U.: Indoor unit
O.U.: Outdoor unit
Temp.
≤ 55 ºC
on the top of
comp.
≥ 60 ºC
Only for I.U. with
auto-louver
Reset
(for unit with drain pump)
< 40 ºC
Temp.
(* < 30 ºC)
on the top of
comp.
≥ 40 ºC
(* ≥ 30 ºC)
Temp.
< Ta+20 ºC
on the top of
comp.
≥ Ta+20 ºC
Power to
CMC : ON
No
Power to Y21 Power to RVR
: ON : ON
Higher
I.U.
than 30 ºC
air discharge
temp.
Lower than
25 ºC
25 ºC ~ 30 ºC
Power to CH : ON
Power to CH : OFF
Start of transmission between
I.U. and O.U.
Start of transmission between
I.U. and remote control switch
HEAT indication
HIGH indication
MEDIUM indication
LOW indication
Set temp. indicated
MD : ON
Run LED:ON, RUN is indicated
Only RAS-8~12HRNM
* Test run:
Hot start protection is activated
after 2 hours or 30ºC.
* Standard operation:
Hot start protection is activated
after 4 hours or 40ºC.
Yes Power to
MOF
1 sec.
Power
Operation at
setting fan speed