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Troubleshooting Guide | AE12, RP12T, US12

Data subject to change without notice | Printed in the USA | BTC 721002308 A | 09.2013 

Bosch Thermotechnology Corp.

Bosch Thermotechnology Corp.
50 Wentworth Avenue
Londonderry, NH 03053

Tel:  1-866-330-2729
Fax: 1-603-965-7581
www.bosch-climate.us

Water Heater:

STEP  3:      

Are there any burned or melted wires in the unit?



Yes                         



No       

Are there any signs of water leakage?



Yes                         



No

Is the thermal cut out tripped?



Yes                         



No

If the thermal cut out was tripped, have you reset it?



Yes                         



No

Are there any signs of water leakage?



Yes                         



No

STEP 4:   

Is there continuity across the 

fl

 ow switch when water is 

running through the unit



Yes                         



No

Resistance of each element

Element 1: ________ 

Ω

                        

Element 2: ________ 

Ω

    

Are Either Of The Two Elements Grounded



Yes                         



No

Thermal Cut Out Continuity:    

A-B Terminals:             



Yes                         



No

C-D Terminals:             



Yes                         



No

STEP  5:      

Voltage Supply:

Voltage across L1 - L2: ________VAC                                  

 

 

After completing this questionnaire, please have your 

technician call us while still at the unit at 1-866-330-2729 
for diagnosis and resolution or if it is more convenient, 
please email the completed questionnaire to 
[email protected] and we will reply within one 
business day.

Содержание AE12

Страница 1: ... licensed professional What does this troubleshooting guide cover This guide covers every test we can advise you to perform on the location installation and water heater With ALL the information from ALL the tests in this guide it is possible to diagnose any water heater of this type to a point where we can advise a repair or cover warranty Required tools Adjustable wrench Empty gallon container D...

Страница 2: ...e whole house only to the water heater If you do not have an isolation valve on the water heater you cannot perform this test 2 Open ALL hot water taps connected to the water heater and set all fixtures to hot only 3 Allow some time approx 5 minutes for water to stop running and pipes to drain If pipes are drained you should be able to place a hand over end of faucet and feel no pressure 4 If any ...

Страница 3: ...ater Heater questionnaire on page 6 Step 4 Checking continuity and resistance Ensure the circuit breaker powering the appliance is still shut off Check the thermal cut out switch for continuity 1 Check for continuity between connections labeled A B and also C D see Fig 4 2 Document your findings in the Water Heater questionnaire on page 6 Figure 4 A C D B Check the flow switch for continuity 1 Wit...

Страница 4: ... 5 Document your findings in the Water Heater questionnaire page 6 Figure 7 2 1 Check to see if either element is grounded to the water tubing 1 Ensure power supply to the unit is off 2 Set your multimeter to Mohms 2000K 2M or 20M 3 Place one multimeter probe on the common steel bar that joins the two element terminals together Fig 6 and touch the other probe to the copper water tubing to see if y...

Страница 5: ...sure Municipal Well Other _____________________ Water pressure _______PSI What is the water supply material to and from the heater Copper Plastic Stainless Other ___________ Flex If plastic does plastic piping connect directly to unit Yes No When facing water heater which side of the water heater does the cold water pipe connect to Left Right Top Bottom Circuit breaker size and type Single pole Do...

Страница 6: ...you reset it Yes No Are there any signs of water leakage Yes No STEP 4 Is there continuity across the flow switch when water is running through the unit Yes No Resistance of each element Element 1 ________ Ω Element 2 ________ Ω Are Either Of The Two Elements Grounded Yes No Thermal Cut Out Continuity A B Terminals Yes No C D Terminals Yes No STEP 5 Voltage Supply Voltage across L1 L2 ________VAC ...

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