Bosch C950ES Manuale di riferimento

Technical Service Bulletin:

Resetting the Watervalve

Models: 830ES, 940ES-ESO, C950ES, C1050ES, 1210ES-ESC, T9800/T9900 SE(C)

Data subject to change without notice | Printed in the USA | BTC 740002333 A | 05.2018 Bosch Thermotechnology Corp.

A qualiﬁed service technician is recommended to perform the work.

Problem

Tankless water heater that doesn’t activate, and doesn’t show an error code.

Possible Cause

The watervalve may be clogged or needs to be reset.

Overview

Sometimes a tankless water heater doesn’t start up when water is turned on (above

activation rate), and also doesn’t give an error code. This can be due to the impeller

in the watervalve being stuck or clogged, the water valve being closed, or even just

a clogged inlet ﬁlter. Some of the models have an inlet ﬁlter accessible from outside

the machine, which you can inspect for debris ﬁrst. Other models have it directly

in line with the watervalve, in which you will have to disconnect and remove the

watervalve for access.

Procedure

1. Drain the machine down of any water on both the hot and cold sides.

2. Remove the inlet and outlet water clips and remove watervalve from the

machine. After it is removed, disconnect all wiring to the watervalve.

Inspect the screen for any blockage and clean if necessary.

3. Remove the 2 Phillips head screws that hold the watervalve engine to the

watervalve body (Fig. 1).

Figure 1

4. Remove the 2 Phillips head screws that hold the watervalve engine to the

watervalve body (Fig. 1).

5. Separate the 2 the watervalve body and the watervalve engine.

6. On the valve side, locate the brass gear. Rotate the gear counter clockwise

(towards the “0”) until it stops (Fig. 2).

Figure 2

All manuals and user guides at all-guides.com

Data subject to change without notice | Printed in the USA | BTC 740002333 A | 05.2018 Bosch Thermotechnology Corp.

Technical Service Bulletin

2 | Resetting the Watervalve

Bosch Thermotechnology Corp.

65 Grove Street

Watertown, MA 02472

Tel: 1-866-642-3198

Fax: 1-954-776-5529

www.boschheatingandcooling.com

7. On the motor side, slowly rotate the gear clockwise to “0” (Fig. 3). There are

gears inside this motor that cause resistance, do not try to move it fast or

you will damage the gearing.

Figure 3

8. Once that is completed, make sure you can blow through the valve freely

from the bottom where the cross diverter is (Fig. 4). When you forcefully

blow through the valve, you should hear the impeller spinning. If not, use

a small pick or similar device to manually move it. It should move freely

with no resistance. Any resistance could be signs of buildup inside the

valve. Flushing out the valve at this point would be your only way to clear

that obstruction. The impeller is not removable on these valves. If it can’t

spin freely by ﬂushing out the valve or manually rotating it, you may need to

replace the valve.

Figure 4

9. After performing the service, attach the watervalve engine to the watervalve

body with the 2 phillips head screws as shown in Fig. 1.

10. Plug the wiring back in, and reinstall the clips on both the incoming and

outgoing side of the valve.

11. Slowly turn on water supply to check for leaks, before powering up and

returning the tankless unit to service

All manuals and user guides at all-guides.com

Altri manuali per C950ES

Questo manuale è adatto per i seguenti modelli

Altri manuali Bosch Scaldabagno

Bosch

Bosch GWH 10-2 G Series Documento tecnico

Bosch

Bosch Integra 500 Manuale utente

Bosch

Bosch WT 11 AM1 E Guida

Bosch

Bosch BC3200RABC3200RA5 Manuale utente

Bosch

Bosch Tronic TR4500T 50 EB Manuale utente

Bosch

Bosch AE12 Manuale utente

Bosch

Bosch RDH06101 Manuale utente

Bosch

Bosch GWH 260 PN Manuale utente

Bosch

Bosch TR5000 24EB Manuale utente

Bosch

Bosch 830ES Manuale utente

Bosch

Bosch Exxcel 1400 Guida utente

Bosch

Bosch AquaStar 125B LPS Manuale

Bosch

Bosch GWH 715 ES Manuale utente

Bosch

Bosch AquaStar 250SX NG Manuale utente

Bosch

Bosch OptiFlow Professional GWH16 1 CTD E23 F5 L Manuale utente

Bosch

Bosch GWH 715 ES Manuale utente

Bosch

Bosch BST 500-1000/80 Sr Manuale utente

Bosch

Bosch Tronic 8500 Manuale utente

Bosch

Bosch AquaStar 125HX LP Manuale utente

Bosch

Bosch Tronic 3500 TO Manuale utente

Bosch

Bosch Compress 3000 Manuale utente

Bosch

Bosch AquaStar 125FX LP Manuale utente

Bosch

Bosch TR4000R 6 ET Manuale utente

Bosch

Bosch C1210ES Istruzioni per l’uso

Manuali Scaldabagno popolari di altre marche

Kenmore

Kenmore 153.582400 Manuale utente

Applimo

Applimo Edel AIR Manuale utente

STIEBEL ELTRON

STIEBEL ELTRON Eltronom SHU 5 S Manuale utente

clage

clage E-Mini Series Manuale utente

Toyotomi

Toyotomi Oil Miser OM-180 Manuale utente

Bradford White

Bradford White EF Series Manuale utente

Eccotemp

Eccotemp 40-H Manuale utente

Dimplex

Dimplex ECSd125-580 Guida

Dux

Dux 32FCR6N Manuale utente

Toyotomi

Toyotomi Oil Miser OM-148 (Type D) Guida alla risoluzione dei problemi

Noritz

Noritz N-132M Manuale di istruzioni

TESY

TESY GCV7/4S 10047 Scheda tecnica

A.O. Smith

A.O. Smith Gphe 50 Manuale utente

Koryo

Koryo KWHZF15Y Manuale utente

Pentair

Pentair PSC-14-4-02 Manuale utente

GE 40M06AAG Istruzioni per il montaggio

Thermor

Thermor AEROMAX SPLIT 2 Manuale utente

American Hometec

American Hometec AHQ-B03X Manuale utente