When carrying out any repair work on the HIU the unit must be switched off and isolated!
Always isolate the power supply before opening the unit!
FAULT CODE
DISPLAY SYMBOL
MESSAGE
ACTION
REMARKS and REFERENCES
A fault has been detected in the PICV.
The result is that central heating and
DHW may not be available as the HIU PID
Controller will not allow these functions
until the fault is rectified.
Check cable and connectors.
Check the PICV Actuator;
•
power up and run a test
sequence as per
commisioning instructions
Replace the PICV actuator valve
if found to be faulty
See Section Technical
Specification
-
PICV
The HIU PID Controller will
automatically reset to normal
operation once the cause of the
fault has been corrected.
PICV ACTUATOR
Spare Part Ref
H10007SP
Follow the instructions with the spare,
note the valve pin must be fully re-
tracted before re
-
fitting.
A fault has been detected in the pressure
switch. The result is that central heating
is not available.
POTENTIAL CAUSES:
•
Low pressure in the central heating
system
•
Connecting cable is damaged or
disconnected
•
Pressure switch is faulty
•
Check system pressure,
refill, check for leaks. EO
warning then goes off
•
Check cable and
connectors
•
Check pressure switch
functionality
•
Replace the pressure
switch if found to be faulty.
PRESSURE SWITCH
Spare Part Ref
H10016SP
Other Trouble shooting checklists where there is NO ERROR warning, which may be useful to check through:
Ref
REPORTED PROBLEM
Trouble Shooting Checklist
1
Reported problem;
•
The water from the hot taps is COLD.
•
Is there power to the HIU?
•
Possible blockages –
if there is heat coming into the HIU
from the communal heating system, follow the path
through the Strainer, PICV, Diverter ?
•
Plate Heat Exchanger blockage, possibly scale. If suspect-
ed take the necessary steps to remove and clean (Fig 8B
in the Section Maintenance)
Once blockages are cleared, then reconnect the unit, and fol-
low the commissioning instructions.
2
Reported problem;
•
There is NO WATER at the Hot Taps.
•
Is there water at the cold taps? If not, check the mains
stop tap. If it is found to be closed, open it and check the
fault is resolved.
•
Are the HIU isolation valves ON?
If not check for blockages on the cold water supply pipe.
Check all filters and clean if blocked.
When carrying out any repair work on the HIU the unit must be switched off and isolated!
Always isolate the power supply before opening the unit!
SECTION 9
-
Fault codes and fault finding
09/17 E & OE
Summary of Contents for Hiper Xi45 INDIRECT HIU 45DHW/10HTG
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