Related Manuals for STIEBEL ELTRON IM 45 EC
Summary of Contents for STIEBEL ELTRON IM 45 EC
- Page 1 Service Manual IM_EC Author: Mr. Apiwat Limrueangwattanakul Date: MAY 2015 Revision: version 0...
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Page 2: Table Of Contents
Table of Contents Warning ................................3 General product information ......................... 4 Technical data ..............................5 Wiring Diagram ............................... 6 Troubleshooting .............................. 7 Root clause analysis ............................9 Heating Elements checking ......................... 9 TRIAC checking ..........................10 Flow Switch checking ........................11 Control PCB checking ........................ -
Page 3: Warning
Warning Warning: This service manual is suitable for qualified Technicians only. Warning: Disconnect power supply before open cover. -
Page 4: General Product Information
General product information The STIEBEL ELTRON IM flow-controlled, pressurized instantaneous water heater heats the water while it is flowing through the unit. The heating power is switched on automatically in the event of the minimum flow rate being exceeded. The “Power” light indicates that heating system is switched on. -
Page 5: Technical Data
Technical data Model IM 45EC IM 60EC IM 80EC Type Closed outlet Min. inlet water pressure MPa(bar) 0.015(0.15) 0.02(0.2) 0.03(0.3) Max. inlet water pressure MPa(bar) 1(10) Water connection G 1/2" Electrical connection 1/N/PE ~ 220…240V 220 V 230 V 240 V Recommended cable size Sqmm. -
Page 6: Wiring Diagram
Wiring Diagram Type DX…E A = Heating element B = Electronic control set (Phase Cut) C = ELCB D= Triac Set E = Thermal cut - out (TCO) -
Page 7: Troubleshooting
Troubles shooting Problem & Condition Cause Correction Power lamp not "ON" - No power supply to unit - Check breaker and water not hot - Check connecting - Power line not tight points and fix. - ELSD cut-off - ELSD reset - Check Triac set - Thermal cut-out (TCO) - Check Reed switch... - Page 8 Troubles shooting Problem & Condition Cause Correction Breaker cut-off - Overloaded current on main - Turn off other appliance breaker - Power line wrong connection - Reconnect power Power on maximum but - Water over flow - Reduce water flow water not hot enough Water temperature - Irregular water flow...
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Page 9: Root Clause Analysis
Root clause analysis 1. Heating Elements Checking Definition: Heating Element is a metal coil that heats up to high temperatures, when electricity is applied. To check the Heating Element, follow the steps below: - Disconnect cables from the Elements. - Set Multi meter to Ohm range "Ω" or " )))) "and check as show in the pictures. ... -
Page 10: Triac Checking
2. TRIAC Checking Definition: The Triac is a three-terminal device, which controls and conducts current flow during both alternations of an AC cycle. To check Single Triac, follow the steps below: - Disconnect cables and unplug any connectors in red circle. - Set Multimeter to Ohm range "Ω"... -
Page 11: Flow Switch Checking
3. Flow Switch Checking - Set Multimeter to Ohm range "Ω" or " ) " and unplug reed switch from PCB then check it as show in the pictures. Pole - Pole Check Meter Result Cause Action Reed SW contact closed Change Reed SW No signal "OL"... -
Page 12: Control Pcb Checking
4. PCB control Checking Visual check Check Result Cause Action Electronic equipment burn PCB short circuit Change new one Visual No visible damage PCB failure Change new one... -
Page 13: Thermostat Checking
5. Thermostat resetting Manual Reset Thermostat Definition: The thermostat is a sensor with a closed circuit N ). t will automatically cut out ower system when the water in tan rises to 5 5 . To check the thermostat, follow the steps below: -Disconnect cables as in the picture. -
Page 14: Elcb Checking
6. ELCB checking Function: ELCB will cut out the Electric power system, when leakage is approximately 15 mA. - Disconnect Electric power lines as in the pictures. - Set Multi meter to Ohm range "Ω" or " ) ) " and check as shown in the pictures. - Note the differences in the locations of the multimeter pointers . -
Page 15: Elcb Function Testing
7. ELCB function testing - Connect electric power lines as in the pictures. - Supply electricity. - ELCB will cut out the power when the ELCB test button is pressed. ELCB Test = Press left ELCB Reset = Press right (ELCB –... -
Page 16: System Comfirm
8. System confirm Ensure that you have tightened all the screws back into their original positions. This final test must be performed after repairing the unit. If all steps below are working correctly the unit can be returned to the end user. 1.
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