SECTION 7
-
The HIU Controller first power up and set up
Page 20
SECTION 10
-
Fault and Error Codes / Fault finding guide
Danger
-
230v !
NO HEATING
Is a warning symbol displayed
on the controller screen?
Heating ON!
Is the primary FLOW rate
and temperature sufficient?
YES
NO
YES
Is the room thermostat
is calling for heat.
Set room thermostat
and turn heating on
Symbol for heating
appears and pump on
Does the heating symbol show on the
display when the room thermostat is
calling for heating?
NO
YES
Check the room thermostat
wiring to the controller is
as per page 12.
If 230 v has been applied to the room
thermostat connections then the
controller maybe damaged beyond
repair and will have to be replaced.
Warranty will not cover this!
*see
Installer Controller Parameter Settings Guide
YES
Check room thermostat wiring.
N/open or N/closed switching?
See installer parameter 26*.
Check room thermostat by over ride on
parameter 25* (manual heating).
Replace room thermostat if found faulty.
Vent the system of air.
Rectify.
Problem is not the HIU.
NO
Replace pump
Pump
-
are LED
’
s
flashing red?
YES
NO fault code displayed
See fault code description and check if the
programming is correct* If prepayment
used, is it in CREDIT? If a fault code is
showing* rectify the fault according to the
code description.
* Have the
‘
Controller Programming Guide
at hand!
06/21 E&OE