Heatrae Sadia ELECTROMAX Installation & Servicing Instructions Manual page 33

SWITCH ON
WATER HEATER
& ILLUMINATED
NOT WORKING
OFF PEAK (LOWER)
IMM. HEATER
BOOST (UPPER)
IMM. HEATER
WATER FLOW
WHEN TAPS ARE
Diagram 30 Water Heater Fault Finding Master
IS DHW
NO
CHECK ELECTRICAL
SUPPLY
YES
DOES
GO TO OFF PEAK
NO
IMMERSION HEATER
FAULT FINDING
OPERATE
YES
DOES
GO TO BOOST
NO
IMMERSION HEATER
FAULT FINDING
OPERATE
YES
DOES
GO TO WATER FLOW
NO
PROBLEMS FAULT
FINDING
OPENED
YES
GO TO EXPANSION
YES
RELIEF VALVE
FAULT FINDING
NO
GO TO T&P RELIEF
YES
VALVE FAULT
FINDING
NO
SWITCH OFF WATER
HEATER. CONTACT
HEATRAE SADIA
OFF PEAK (LOWER)
SUPPLY AT
IMM. HEATER NOT
OPERATING
TERMINALS
SUPPLY AT
OFF PEAK (LOWER)
THERMOSTAT
TERMINALS
NOTE:
DO NOT CHECK ELEMENT
RESISTANCE WITH POWER
ON
THERMOSTAT
SET TO A LOW
TEMPERATURE
THE THERMAL
OPERATED
Diagram 31 Water Heater Fault Finding Off Peak
(Lower) Immersion Heater Faults
Installation & Servicing Instructions
IS 240V
CHECK OFF PEAK
NO
ELECTRICAL SUPPLY
OFF PEAK
IS ON
YES
IS 240V
NO
CHECK INTERNAL
WIRING
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
NO
NO
REPLACE
THERMOSTAT
33