Tuttnauer 2540 EHS, Technician Manual

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73
Corrections
1.1.1 Fix
leakage.
1.1.2
Replaces the faulty heating elements.
1.1.3
Replace the faulty pressure switch. 1.1.4.1
Reset the cut-off thermostat. If it does not help – replace it.
1.1.5.1
Reset the cut-off thermostat. If it does not help – replace it.
1.1.5.2 Fix
connection.
1.1.5.3
Replace faulty contactor.
1.1.6.1
Clean the contaminated electrode.
1.1.6.2
Replace faulty electrode.
1.1.6.3
Fix electrode electrical connections. 1.1.6.4.1 Clean
clogged
piping.
1.1.6.4.2 Replace
water
pump.
1.1.6.4.3 Replace
non-
return valve.
Possible cause check-up and tests
1.1
Low temperature and low pressure. 1.1.1
Check leakage from the chamber or from the jacket.
1.1.2
Faulty heating element.
1.1.3
Faulty pressure switch.
1.1.4
On model 2540 only: 1.1.4.1
Cut-off thermostat disconnects the heating element.
1.1.5
On model 3870 only: 1.1.5.1
Cut-off thermostat disconnects command to the contactor that disconnects the heating element.
1.1.5.2
The contactor is disconnected.
1.1.5.3 Faulty
contactor.
1.1.6
Lower water level electrode does not sense water. Possible cause: 1.1.6.1 Contaminated
electrode.
1.1.6.2 Faulty
electrode.
1.1.6.3 Electrode
disconnected.
1.1.6.4
Low or no water inlet and water pump operates too often. 1.1.6.4.1
Water inlet pipe to the chamber is clogged.
1.1.6.4.2
Faulty water pump.
1.1.6.4.3 Water-inlet
Non-
return valve is stuck.
10. TROUBLESHOOTING (cont.)
10.2
Preliminary Troubleshooting
Symptom
1.
“Low temp” is displayed