DAYLIFF ULTRASUN UFD, Installation & Operating Manual

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9
INDIRECT SYSTEMS
POSSIBLE CAUSE SOLUTION
Heated water
loss
Leaking water pipes
Check regularly for leaks and repair
PROBLEM
Inoperative
electric heater
Power supply or booster switch off Switch on power or booster switch
Blown fuse Replace fuse
Tripped circuit breaker
Switch on the breaker
Thermostat failure
Replace the thermostat
Low thermostat setting
Adjust the thermostat
Faulty electric element
Check element circuit continuity and
replace the element if faulty
Water discharge
from pressure
release valve
Pressure above 3 bar Lift valve hand lever and reset valve
High mains pressure
Use a pressure tank to regulate and
reduce pressure levels
Pressure is below specification settings
Replace the valve if discharge
continues
Pressure feedback from another device
Check that there is no feedback
pressure from another device
connected to hot reticulation
circuit
Insufficient
pressure
Inlet water strainer blocked Unblock the strainer
Unit supply pipework blocked or
undersized
Unblock the pipe work
Replace with correct pipework
Mains supply pressure below 1 bar
Consult supply authority for
modifications to the system
Pressure control valve flow insufficient
for user’s requirements
Install a large valve but should not
exceed rated tank pressure of 3.5
bar