Diagnostics And Troubleshooting - Panasonic PAW-DHW270C1F Handbuch

Overview
Fault observed
No more heat
No hot water
Not enough hot water
At max. setpoint (62° C)
Not much flow from the hot water
tap.
Continuous flow of water to the
safety unit when heater is not
heating
The electrical backup is not
working.
Condensate overflow.
Bad smell.
Control panel fault or display
problem
After servicing or troubleshooting, check that the water heater is operating properly
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Installation
Possible cause
No power supply to the water
heater: fuse, wiring ...
Hot water heater not large enough
Operating in ECO
Safety unit's filter clogged
Water heater scaled up
Safety valve damaged or dirty
Mains water pressure too high
Mechanical thermostat in safety
mode
Electric thermostat is faulty
Resistor is faulty
Clogged condensate flow
No siphon on the safety unit or the
condensate drain
No water in safety unit's siphon
No power
Display fault
Use Maintenance

Diagnostics and troubleshooting

Check the presence of voltage on
the power cables
Check the installation settings (see
the operating ranges)
Check the duration of the
programming ranges
Select the AUTO mode
Clean the filter (see maintenance
section).
Descale the water heater.
Replace the safety unit
Check that the outlet pressure of
the water meter does not exceed
0.5 MPa (5 bar), otherwise install a
pressure reducer set at 0.3 MPa (3
bar) from the general water supply
Reset the thermostat safety at the
resistor
Replace the thermostat
Replace the resistor
Clean
Install a siphon
Fill the siphon
Check the power supply.
Check the connection (A3
reference)
Replace the display.
Warranty