User Maintenance; Fault Diagnosis - Mira Coda PRO ERD Installation & User Manual

USER MAINTENANCE

If you require a Mira trained service engineer or
agent, refer to section: 'Customer Services'.

Fault Diagnosis

Symptom:
•
Only hot or cold water from the mixer outlet.
•
Outlet temperature too hot / too cold.
Cause / Rectification:
•
Inlets reversed (hot supply to cold supply).
Rework inlet pipework.
•
No hot or cold water reaching the mixer.
•
Check the filters for any blockage.
•
Installation conditions outside operating
parameters, refer to sections: 'Specifications'
and 'Commissioning'.
—————————————
Symptom:
•
Fluctuating or reduced flow rate.
Cause / Rectification:
•
Check the showerhead, hose and filters for
any blockage.
•
Make sure that the maintained inlet pressures
are nominally balanced and sufficient, refer to
section: 'Specifications'.
•
Make sure that the inlet temperature
differentials are sufficient, refer to section:
'Specifications'.
•
Flow regulator fitted incorrectly.
•
Air lock or partial blockage in the pipework.
—————————————
Symptom:
•
Water leaking from showerhead.
Cause / Rectification:
•
Normal for a short period after shut off.
•
Check that the pressures are not in excess of
the specifications for the product.
•
Cartridge inlet seals damaged, renew.
•
Renew the thermostatic cartridge.
Filters
The sealing washers / filters are located in the inlet
connector. Clean or renew as necessary.
Lubricants
Silicone based lubricants must only be used on
the rubber seals.
Caution! Oil based or other lubricant types may
cause rapid deterioration of seals.
Cleaning
The chrome plated parts should be cleaned using
a mild washing up detergent or soap solution,
rinsed and then wiped dry with a soft cloth.
Warning! Many household cleaners contain
abrasive and chemical substances, and should not
be used for cleaning plated or plastic fittings.
Do not use descalents on this product.
Maintaining the Non-Return Valves
The non-return valves are located in the
thermostatic bar valve body, and are accessible
through the inlet connectors.
Caution! Make sure that the non-return valves
are installed correctly to prevent crossflow or
malfunction of the valve.
1. With the water supplies turned off and the
thermostatic bar valve removed, remove the
sealing washer / filter.
2. Unscrew the non-return valve housing using
a 12 mm hexagonal wrench.
Note! The non-return valve housing has a Left
Hand Thread, turn clockwise to unscrew.
3. Carefully remove the non-return valve and
clean any debris.
4. On re assembly make sure that the non-return
valve is fitted the correct way round (with the
arrow indicating the flow pointing towards the
valve).
Sealing Washer/Filter
12
Non-Return Valve
Inlet Connector/
Non-Return Valve Housing