Nespresso EF 474, EF 473 manual Replacing thermoblock and NTC, Tools

Page 18

Repair

Replacing thermoblock and NTC

Tools:

-Torx screwdrivers T10, T30

-Open-ended spanner 10 mm AF

-Torque wrench

Procedure:

1.Follow general disassembly (see page 16).

2.Remove screw (23) and detach holder

(48)with flow meter (47).

3.Remove 3 screws (23) and separate thermoblock (40) with support (40) from chassis.

4.Remove screw M3.5 x 25, washer and rubber gasket and separate thermoblock

(40)from its support.

5.Remove screw (38) and separate fine wire fuse (900) from thermoblock.

6.Remove electronic housing (28).

7.Unplug NTC connector from electronic control board (28).

8.Remove NTC (43) from thermoblock and replace it if defective.

9.Remove clips (13) and hose connectors (16, 26) from thermoblock.

10.Remove ground wire and electrical connections from thermoblock.

11.Replace defective thermoblock.

12.Assemble in reverse sequence.

Service Manual EF 473 / EF 474

)Use a torque wrench (90 - 110 Ncm) to tighten NTC temperature sensor (43) with spring washer (42).

		47 + 48
		23
28	M3.5 x 25
28	38
16	38	40
16
13
26	38	40
	39	40
	39
	43	23
	43	42
	900	42
18		Version 1.0 en

Image 18

Contents Essenza FS Contents Preface Main Components OverviewOverview of rating plates Serial number codificationWater circuit Technical data Operation PreparationDo not insert a capsule yet Procedure to fill water system Fill water systemMaking coffee Programming Reset to factory settings Empty water system Operating modes Left Coffee buttons LED signals Right Coffee machine statusOperating status of coffee buttons Troubleshooting Checking the machine on receiptFurther details in order to take decision General disassembly RepairTool Replacing thermoblock and NTC ToolsReplacing flow meter and On/Off switch Procedure for flow meterProcedure for On/Off switch Replacing pump Replacing electronic control board with button prints Replacing compact brewing unit CBU Pump Pump On/Off switch Repair Carefully read safety instructions on decalcifier package DescalingDescaling Rinsing SecMeasuring flow rate Checking for leaks and pump pressure Preparation unplug machine from mainsSwitch off machine Open valve to empty pressure gauge Measuring coffee temperature Coffee temperature should be approx C ± 3 C 187 F ± 5.4 FDaily care and final cleaning Procedure machine is switched offRepair accessories Spare PartsSpare parts EF Electronic set 230V EF Coffee outlet & front ring EF 471 package 29 39154 Coffee buttonEF 30 43061 Espresso button EF 26392 Version 1.0 en