Heatrae Sadia ELECTROMAX Installation & Servicing Instructions Manual page 33

Diagram 32 Water Heater Fault Finding
Boost (upper) Immersion Heater Faults
BOOST (UPPER)
SUPPLY AT
IMM. HEATER NOT
OPERATING
TERMINALS
BOOST (UPPER)
THERMOSTAT
TERMINALS
NOTE:
DO NOT CHECK ELEMENT
RESISTANCE WITH POWER
ON
THERMOSTAT
SET TO A LOW
TEMPERATURE
THE THERMAL
IS 240V
CHECK 24 HOUR
NO
ELECTRICAL SUPPLY
24 HOUR
IS ON
YES
IS 240V
SUPPLY AT
NO
PRESS BOOST
SWITCH
YES
REPLACE
NO
IMMERSION
HEATER
YES
IS
YES
SET THERMOSTAT
TO POSITION 4 TO 5
NO
HAS
YES
RE-SET THERMAL
CUT-OUT
CUT-OUT
OPERATED
NO
NO
REPLACE
THERMOSTAT
YES
ALLOW TIME FOR
WATER TO RE-HEAT
CHECK INTERNAL
WIRING
NO
IS 240V
SUPPLY AT
BOOST (UPPER)
THERMOSTAT
TERMINALS
YES
Diagram 33 Water Heater Fault Finding
Water Flow Faults
WATER FLOW
WATER FLOW
WHEN OUTLETS
PROBLEMS
ARE OPENED
WATER FLOWING
WATER HOT
Installation & Servicing Instructions
DOES
CHECK MAINS WATER
NO
SUPPLY IS ON.
CHECK COLD WATER
COMBI VALVE IS
CORRECTLY FITTED.
CHECK STRAINER IS
NOT BLOCKED
YES
IS CHECK OPERATION
NO
OF IMMERSION
HOT HEATERS
YES
YES CHECK AFTER A FULL
OFF PEAK HEATING
PERIOD
NO
IS
NO
CHECK THERMOSTAT
SETTINGS
ENOUGH
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