Dry Operation - Hitachi RAS-5HVRNM1E Service Manual

5 Control System

Dry operation

Power to
O.U.: ON
Power to Power to PCB in
I.U.: ON
Power to YH2 in
Setting at
DRY
Pressing
TEMP.
switch
Pressing
RUN/STOP
switch
< 4 hours
After
(* < 2 hours)
power
supply
≥ 4 hours
(* ≥ 2 hours)
DRY
operation
Power to MC: OFF
Power to MIF: OFF
to 1
Continues in the next page.
130
SMGB0060 rev. 1- 12/2010
Auto-louver 0
Reset
I.U.: ON
FS
ON
I.U.: OFF
(Lower than activation level)
Switch: increasing set temp.
Switch: decreasing set temp.
Indication of unit
stoppage cause (d1-22)
< 50 ºC
Temp.
(* < 30 ºC)
on the top of
comp.
≥ 50 ºC
(* ≥ 30 ºC)
Power to YH2 : ON
Power to EHW : ON
Higher than Set
Temp. +2 ºC
I.U. Air
Outdoor
intake temp.
Temp.
Lower than set
< -5 ºC
temp.
6
No
min.
Yes
I.U. fan
operation: low
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
OFF
(Higher than
activation level)
Power to YH2 in
I.U.: ON
Run LED:ON, RUN is indicated
< 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
I.U. Fan Operation: Low
≥ -5 ºC
Power to
1 sec.
Y52C : ON
No
Outdoor Fan MOF operation
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
MD : ON
(for unit with drain pump)
DRY indication
Set temp. 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.
(for unit with
MD : ON
drain pump)
Power
Yes
to MC
No
6
min.
Yes