Hitachi RAS-5101CH Servicehandbuch Seite 50

Heating load reduction and Pd cut
PD CUT 1
PD CUT 2
PD CUT3
FAN RELAY H
FAN RELAY L
POWER RELAY
STICK RELAY
EXTERNAL FAN RELAY
4-WAY VALVE RELAY
Reversing valve lock protection
1
Low-temperature input
Fan relay H °
Power relay
Stick relay
External fan relay
Reversing valve relay
Timer lamp
To
Ts
Te
17
Te
T3
T4
TEMPERATURE OF INDOOR HEAT
EXCHANGER THERMISTOR
@ AIR BLOW CHANGE TO "H" FORCILY BY INPUTING "PD CUT 2"
AIR BLOW MAKE A POSSIBLE TO CHANGE AIR BLOW AT TEMP. T>.
AIR BLOW RETURN TO THE ORIGINAL SETTED TEMP. AT TEMP Ts.
Indoor heat exchanger
thermistor temperature
ME
0 Cee Yshapavs ra 1,
All relays are stopped by low-
temperature input.
Not accepted during hot keep,
during compressor stop, during
defrosting and during forced
3 minutes.
Accepted only during heating
operation.
Receovery at the time of stop by
low-temperature input is reset
recovery.
The timer lamp flashes at the
time of stop.
~ 45 -