Troubleshooting Guide - Hitachi YUTAKI-M Serie Guia Del Usuario

Troubleshooting Guide

6
symptom
The Room Unit has
a blank LCD screen.
The Room Unit
shows a flashing
symbol on the
LCD screen.
The Room Unit
shows a flashing
symbol on
the LCD screen.
The Room Unit's
LCD display works
but the heating does
not switch on.
The red LED on the
RF Receiver located
next to heat pump
controller is constantly
on or flashing.
FAQ's
how do I change the batteries on the
Room Unit when they run out?
The Room Unit constantly monitors the battery
power level, which typically lasts for about
2 years before needing replaced. When the
power is running low a flashing
will be displayed on the screen. To change the
batteries follow the steps in the above section
('sTEP 1: Installing the Batteries' on page
3), replacing the used batteries with new ones
in Step c. Note: While changing the batteries
your program settings will be stored but you
may need to adjust the time settings to be
correct.
Possible cause
Batteries not installed.
Incorrect battery
orientation.
Exhausted batteries.
Batteries are exhausted
and need replacing.
Fault in Room Unit
No power to heating
system.
Program does not call
for heat.
Wrong electrical
connection.
RF communication
lost due to the wrong
location of the Room
Unit.
RF communication fault. Call installer.
symbol
Remedy
Check to see if there are batteries in the
battery compartment and the paper tab has
been removed.
Check that the batteries have been installed
in the correct orientation.
Replace with new batteries.
Replace with new batteries.
Remove and re-insert the batteries in the
Room Unit. If the
clear itself in a few minutes call the installer.
Check that there is power to the heating
system.
Press the button and then press the
to increase the temperature a few degrees
above the current room temperature. The
heating should come on after a few seconds.
Call the installer to check the electrical
connections
Hook the Room Unit back on the wall
bracket or replace the Room Unit on
the table stand in the position where RF
communication was reliable.
I want to use the table stand instead
of wall mounted bracket. Where can I
position the Room Unit?
It is important to keep the Room Unit in a
location where reliable RF communication
was proven. Advise your installer where would
you like to position the Room Unit and he will
check if the RF communication is reliable in
the selected location(s).
Important: As this is a wireless device certain
objects could interfere with the RF signal -
Leave at least 30cm distance from any metal
objects (including wall boxes) and at least 1
metre from any other electrical equipment eg.
radio, TV, PC, etc.
symbol does not