Mira Vision Owner's Installation Manual page 42

Symptoms
User Interface displaying
Error 3 or Error 7 - Showering
temperature has got too hot
and the Digital Mixer has
safely shutdown
Internal Leaking
1184347-W2-G
Probable Cause
Hot inlet water supply
temperature is too high
Combination boiler cutting in
and out (HP/Combi valve only)
causing blend temperature
fluctuations
Cold inlet water supply
pressure too low or fluctuating
Cold inlet water supply failure
Inlet filters or check valves
blocked
Digital Mixing valve air locking
Reversed inlet supplies
Digital Mixer valve box failure
Pumped Gravity LP valve
fitted to a HP/Combi water
system
Digital Mixer valve box failure
42
Possible Remedy
Reduce hot inlet water
temperature to between
55°C and 65°C, refer to
"Specifications"
Refer to "Use of Flow
Regulators" for correct
operation
Ensure the water supply
pressures are stable and
nominally equal, refer to
"Specifications"
Check and remedy
Check and remedy, refer to
"Maintenance"
Check for correct
installation practices, repeat
commissioning procedure
and rearrange pipework
to avoid airlock forming,
refer to "Typical Suitable
Installations"
Check and remedy
Contact Kohler Mira Ltd
Pumped Gravity LP valves
are not suitable for connection
to HP/Combi water systems,
refer to "typical suitable
installation"
Contact Kohler Mira Ltd