0800 019 5899 [email protected]
18
Important information and warnings!
Diagnostics, error codes and descriptions
Maintenance
ThermoSphere Micro Electric Boilers are designed to provide long and reliable service. Actual life expectancy will vary
with water quality and use. The unit itself does not require any regular maintenance.
However, to ensure consistent water flow, it is recommended to periodically remove any scale and dirt that may build
up in the inlet filter, the tap or in the shower head.
Other than the inlet filter, there are no user serviceable parts inside a ThermoSphere Micro Electric Boiler.
In case of an irresolvable or error or mechanical lockout please call ThermoSphere and tell us the error
code. We will arrange for a support technician to try to resolve the issue remotely or via a site visit.
Error code LED display
Error description (cause)
Error type
N/A
OFF
No power
No error
00
Slow flashing
GREEN
Standby (normal operation)
No error
01
Fast flashing
GREEN
Heating (normal operation)
No error
N/A
Solid
ORANGE
Water conductivity too low
No error
N/A
Solid
ORANGE
In priming mode
No error
A4
Flashing
RED
Operating temperature too low
Blocking / Resolving
A5
Flashing
RED
Operating temperature too high
Blocking / Resolving
A6
Flashing
RED
Outlet water temperature 5°C above set point
Blocking / Resolving
A7
Flashing
RED
Inlet cold water input sensor open circuit
Blocking / Resolving
A8
Flashing
RED
Inlet cold water input sensor short circuit
Blocking / Resolving
A9
Flashing
RED
Outlet cold water input sensor open circuit
Blocking / Resolving
AA
Flashing
RED
Outlet cold water input sensor short circuit
Blocking / Resolving
Ac
Flashing
RED
AC mains electrical supply failure
Blocking / Resolving
FA
Solid
RED
High temperature limit exceeded >70°C
Mechanical lockout
Fb
Solid
RED
Water conductivity too high
Mechanical lockout
Fc
Solid
RED
Earth leakage detection
Mechanical lockout
Fd
Solid
RED
CPU watch dog timer error
Mechanical lockout
FE
Solid
RED
Temperature control error (A6 >5 times)
Mechanical lockout
FF
Solid
RED
Unkown failure
Mechanical lockout