Hitachi RWM-(H)FSN3E, Service Manual

Page: 186 / 424

5 Control system
SMGB0070 rev. 1 - 08/2011
176
• During Normal Operation
Š
Temperature Override
During normal operation (AUTO ( ) or MAN ( ) mode) the programmed temperature can be adjusted manually by pres -
sing the or buttons or the button. The ‘target’ temperature will be displayed and flash for 5 seconds - during this
time the or buttons can be used to modify the set value.
N O T E
This temperature override is cancelled at the next programmed temperature change.
Š
Temperature Enquiry
When the Room Unit is configured to control the room temperature directly it will display the current room temperature. To
review the programmed ‘target’ temperature (the temperature which the Room Unit is trying to maintain) press the button.
This ‘target’ temperature value will be displayed flashing for 5 seconds before returning to the current room temperature
value.
Using the Special Functions
Š
HOLIDAY Function
The holiday function allows you to set a constant temperature (default = 10°C) for a specified number of days (from 1 - 99
days). This lets you save energy and related costs when you are away from home, but resumes normal operation on the
day of your return.
To set the Holiday function:
a. Ensure the Room Unit is running in AUTO ( ) or MAN ( ) operating modes.
b. Press the holiday button to display the holiday days counter and temperature setting, along with the holiday
indicator .
c. Press the or time buttons to set the holiday time (1 - 99 days) and press the green button to confirm.
d. Press the or buttons to set the holiday temperature (5°C - 35°C) and press the green button to confirm.
The Room Unit will now control to the new temperature for the set number of days that your home is vacant. At midnight
the holiday counter will be reduced by one until the selected number of days have passed. The Room Unit will then return
to normal operation as set by the AUTO ( ) or MAN ( ) mode. To cancel the HOLIDAY function or to exit the function at
any time press the button a second time.
• Adjusting the Time
To adjust only the time during normal operation use the
or buttons to adjust the time and press the green button
again to confirm any changes.
Cooling Mode procedure (ATW-RTU-01/02/03)
If your system has been set up correctly you can use your thermostat to control the cooling. To switch the thermostat bet-
ween heating and cooling modes press the or buttons together for 5 seconds in any of the product operating modes
(AUTO, MAN or ). The text ‘COOLING’ will be displayed for a moment on the screen to indicate the cooling operation is
now active. The factory default program for cooling is specified in the table below, but this can be modified in the same way
as the default heating program:
Monday to Friday
(Cooling)
Period 1 2 3 4 5 6
Time 6:30 8:00 12:00 14:00 18:00 22:30
Temperature 24°C 28°C 24°C 28°C 24°C 24°C
Saturday & Sunday
Period 1 2 3 4 5 6
Time 8:00 10:00 12:00 14:00 18:00 23:00
Temperature 24°C 24°C 24°C 24°C 24°C 24°C