STIEBEL ELTRON IS E Service Manual Download

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General product information

The Stiebel Eltron

pressureless (open) instantaneous water heater is a device for

heating water for shower. The electrical power is electronically controlled. The unit switches the
power on once the flow volume reach 1.5-2 l/min.

The

“Power”

light (C) indicates that the unit is switched on. If the temperature

adjustment rotary (B) switch is turned to the left, it is possible to take a cold shower (the heating
will not be switched on).

The

is fitted with an overheating protection device. In the event of overheating the

heating power will be cut off.

Summary of Contents for IS E

Page 1: ...1 Service Manual IS_E IS_E 2 Author Mr Apiwat Limrueangwattanakul Date 25 March 2013 Revision version 1 0...

Page 2: ...duct information 4 Technical data 5 Wiring Diagram 6 Troubleshooting 7 Root clause analysis 9 1 Heating Elements checking 9 2 TRIAC checking 10 3 Flow Switch checking 11 4 PCB Control checking 13 5 Th...

Page 3: ...3 Warning Warning This service manual is suitable for qualified Technicians only Warning Disconnect power supply before open cover...

Page 4: ...d The unit switches the power on once the flow volume reach 1 5 2 l min The Power light C indicates that the unit is switched on If the temperature adjustment rotary B switch is turned to the left it...

Page 5: ...external thread Electrical connection 1 N PE 220 240V 220 V kW 3 5 4 5 6 0 230 V kW 3 8 4 9 6 6 240 V kW 4 2 5 4 7 1 Recommended cable size Sqmm 4 0 6 0 6 0 Recommended circuit breaker A 20 30 35 Min...

Page 6: ...eating element B Electronic control set C ELSD Circuit D Single Triac Set E Thermal cut out TCO F Button Board G Current Leakage Sensor Type IS A Heating element B Electronic control set D Single Tria...

Page 7: ...ater not hot PCB failure Check PCB Missing water connection Check reed switch Reed switch failure Check Triac set Triac failure Problem Condition Cause Correction Reconnect inlet outlet Power lamp ON...

Page 8: ...uce water flow ELSD cut off Reed switch failure Water temperature not constant Change pump to smooth pressure type Check reed switch Irregular water flow Triac failure Check Triac set Water leak Wrong...

Page 9: ...Check Meter Result Cause Action Pole Pole Beep signal or 0 Element Pass No action No signal OL or Element Broken Change New Heater Pole GRD Beep signal or 0 Element short to tank Change New Heater No...

Page 10: ...tures Note L1 line H1 Heater GRD Ground Check Meter Result Cause Action L1 H1 Beep signal or 0 Triac short circuit Change new No signal OL or Triac Pass No action Check Meter Result Cause Action L1 GR...

Page 11: ...l find two different ways to check the flow switch 3 1 Option 1 Set unit at vertical direction Set Multi meter to Ohm range or and unplug the reed switch connector from the printed circuit board PCB a...

Page 12: ...and unplug the reed switch connector from the printed circuit board PCB and check Reed Switch as in the pictures Check Result Cause Action Pole Pole Beep signal Pass No action No signal OL or Reed swi...

Page 13: ...13 4 PCB control checking Check Result Cause Action Visual Electronic equipment is burned Short circuit Change new PCB Damage is not visible PCB failed Change new PCB Visual check...

Page 14: ...s below Disconnect cables as in the picture Set multimeter to Ohm range or Check on poles Check Result Cause Action Pole Pole Beep signal Pass No action No signal OL or Connector open Automatic reset...

Page 15: ...ion and turn the knob to the OFF position 2 Connect electricity wiring to the unit and connect the water valve then supply water to the system to check for leaks but keep the main breaker to the unit...