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TROUBLESHOOTING GUIDE
ELECTRIC INSTANTANEOUS TANKLESS WATER HEATER
All information necessary to troubleshoot this
water heating unit is contained in this fully
illustrated guide. If problems still exist after reading
and carrying out the instructions in this manual,
contact Technical Service at the toll free number
"THERMOSTATIC"
EFT MODELS
EFT-5500-4-S-10
EFT-7500-4-S-10
EFT-9500-4-S-10
EFT-8300-4-S-10
EFT-6000-4-S-10
EFT-8000-4-S-10
EFT-9000-4-S-10
EFT-10000-4-S-10
below for assistance
PHONE TOLL FREE
1-800-334-3393
240V
240V
240V
208V
277V
277V
277V
277V
238-43142-00 Rev 3/12/02
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Summary of Contents for Bradford White EFT-5500-4-S-10
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Page 1: Troubleshooting Guide
TROUBLESHOOTING GUIDE ELECTRIC INSTANTANEOUS TANKLESS WATER HEATER “THERMOSTATIC” EFT MODELS EFT-5500-4-S-10 240V EFT-7500-4-S-10 240V EFT-9500-4-S-10 240V EFT-8300-4-S-10 208V EFT-6000-4-S-10 277V EFT-8000-4-S-10 277V EFT-9000-4-S-10 277V EFT-10000-4-S-10 277V All information necessary to troubleshoot this water heating unit is contained in this fully illustrated guide. - Page 2 GENERAL Serial number Indicator light U.L. rating label Model # = Order Ref. # Water outlet/inlet (Bottom) This is how your EFT thermostatic model should look when mounted correctly on the wall. Any other mounting configuration will prevent the unit from operating properly. If the unit is mounted correctly and still does not produce hot water, then look to see if the indicator light illuminates when the hot water faucet is fully opened.
- Page 3 Flow rate (gpm) = v/t x 60 = (1 gal./ 87 sec) x (60 sec./1 min.) = 0.69 gpm. Open all water valves completely. If the indicator light still does not illuminate then proceed to STEP THREE. MODEL TYPE / ORDER REF# MINIMUM FLOW RATE EFT-5500-4-S-10, EFT-6000-4-S-10 0.55 GPM EFT-7500-4-S-10, EFT-8000-4-S-10, EFT-8300-4-S-10 0.65 GPM...
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Page 4: Note: Be Sure The Elecricity Is Turned Off To The Unit
STEP THREE: A multimeter / voltmeter is required to perform the following test Ω WARNING! TURN OFF THE CIRCUIT BREAKER BEFORE PROCEEDING WITH THE NEXT TESTS. Set the meter to the single ohms setting. Ω Do not measure continuity, this will not work. The Ohm Symbol (The upside down horseshoe) NOTE: BE SURE THE ELECRICITY IS TURNED OFF TO THE UNIT... - Page 5 The indicator light illuminates but water is not heated or the water temperature is too low: STEP ONE: The water flow is too high. Reduce the water flow using the faucet. With experimentation, an increase in water temperature should be observed. BE CAREFUL, THE WATER EXITING THE FAUCET IS HOT.
- Page 6 Other possible solutions: NOTE: BE SURE ELECTRICITY IS TURNED OFF BEFORE PROCEEDING STEP ONE: Make sure the printed circuit board is mounted in the correct position. This is the top set of mounting holes (See diagram below). Failure to mount PCB in the correct position will cause element burn out and may cause further damage to the unit (This board may have been incorrectly positioned if serviced previously).
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Page 7: Checking Thermostatic Circuit Board
WARNING! TURN OFF THE CIRCUIT BREAKER BEFORE PROCEEDING WITH THE NEXT TESTS. CHECKING THERMOSTATIC CIRCUIT BOARD If the LED on the circuit board flashes one time very quickly when the water is switched ON then: 1) Turn “OFF” the power to this unit and all other units that may feed hot water to this unit. 2) Be sure that this unit is fed with cold water only.