Hitachi RWM-(H)FSN3E, Service Manual

Page: 149 / 424

5 Control system
SMGB0070 rev. 1 - 08/2011
139
5
• Thermo OFF condition by room thermostat
If Room Temperature Roff is higher (heating operation) or lower (cooling operation) than Room Temperature set-point, it
must also be set to THERMO OFF (Compressor OFF, Heater OFF,…) and water pump must be turned OFF after over-run
time (if ECO Pump is selected).
- Heating application:
If Room Temperature > Room Set-point tempe Roff à Thermo OFF by Indoor temperature
If Room Temperature < Room Set-point temperature à Thermo ON by Indoor temperature
N O T E
In case of multiple Room Thermostats: Thermo OFF occurs when all Thermostats are fulfilled.
-
Cooling application
If
Room Temperature < Room Set-point temperature - Roff
à Thermo OFF by Indoor temperature
If Room Temperature > Room Set-point temperature à Thermo ON by Indoor temperature
N O T E
In case of multiple Room Thermostats: Thermo OFF occurs when all Thermostats are fulfilled.
CODE REF Description Default Value Range Steps Units
3-032 Roff Room Thermo OFF 3 0~5 1 ºC
• Unit OFF status by room thermostat (Heating and cooling application)
If Room Temperature setting is 5ºC or 10ºC. (by pressing OFF button (5ºC) or Holidays button (10ºC) on User Thermostat),
the heating or cooling space selected will be turned OFF. When both User Thermostats are in question, the entire heating
or cooling space will be in the Unit OFF position.