Trouble Shooting; Trouble Shooting Guide; Diagnostic Mode - Hitachi SYSTEM MMI PACK Manuel D'installation

Room Unit Installation Guide
12

5. Trouble Shooting

5.1 Trouble Shooting Guide

Symptom (Fault Message)
The RF Receiver does not
react to setpoint changes
on the Room Unit.
After the binding procedure
the red LED continues to
flash on the RF Receiver.
The red LED is on the RF
Receiver (Communication
loss)

5.2 Diagnostic Mode

The Room Unit has a user accessible mode that provides information useful to a remote service person
and a means of checking whether the heating system is working. To access this press the
button for 5 seconds. The Room Unit will enter the user settings mode. Next press
press and hold the
and hold the and
pressing the or buttons : model ID, date code (WW/YY) & checksum.
Hereby, Honeywell declares that this Room Unit and RF Receiver are in compliance with the essential
requirements and other relevant provisions of Directive 1999/5/EC, 2006/95/EC and 2004/108/EC.
50036443-002 B - Hitachi Room Unit Inst (EN, F).indd 12
Possible Cause
The Room Unit and RF Receiver are not
bound or the installer parameter 8:Su has
not been set correctly.
Incorrect or incomplete binding procedure.
Incorrect position of the Room Unit during
binding.
The RF Receiver receives no RF messages
from the Room Unit:
RF signal is blocked due to wrong location
of the Room Unit.
Room Unit batteries are exhausted.
buttons together. The following information can be viewed on the display by
Remedy
Make sure that the 8:Su parameter
value is set correctly. Reset the RF
Receiver by pressing and holding
the push button for 15 seconds.
Then follow the binding / rebinding
procedure as described in section 4.
Binding / Rebinding Procedure.
Repeat the binding procedure.
Repeat the binding procedure keeping
approx. 1m distance between the RF
Receiver and the Room Unit.
Re-locate the Room Unit following
instructions in section 2. Installing the
System MMI Pack.
Replace batteries in the Room Unit.
button then
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