Troubleshooting - Bradford White KwickShot TEF024V120 Guide D'installation Et Manuel D'utilisation

ENSURE POWER TO THE UNIT IS "OFF" BEFORE REMOVING THE PROTECTIVE COVER
FOR ANY REASON.
For status resolution, please consult the table for your heater model below.
KwickShot® Thermostatic models
Code Name
F23 No heat
F24 Low heat
F33 Residual heat
F34 Overvoltage
F36 Undervoltage
F38 High flow
F47 Inlet
thermistor
failure
F48 Outlet
thermistor
failure
F64 Freeze
warning
KwickShot® Thermostatic models
Status code Model suffix
F33 T, ML
Information contained in this document is subject to change without notice.
SECTION 7: TROUBLESHOOTING
Possible causes
- element failure
- ECO tripped/malfunctioning
- triac(s) failed open
- relay/contactor malfunctioning
- control board failure
- inlet water supply out of spec
- undervoltage
- triac(s) failed open
- control board failure
- inlet/outlet thermistor(s) failure
- internal water temperature elevated
without flow
- both triacs failed closed
- inlet voltage is too high compared to
the stated heater specifications
- inlet voltage is too low compared to
the stated heater specifications
- flow is too high to heat the water to
setpoint temperature
- inlet thermistor interrupted or
disconnected
- outlet thermistor interrupted or
disconnected
- inlet temperature is too low (below
35°F)
Default values
Trip
Reactivation
Heater response
Heating will be disabled after 30
seconds of continuous no heat
condition.
Heating enabled, reduced
performance (lower outlet
temperature).
Heating disabled until outlet
temperature falls below the
reactivation temperature (see
default parameters table).
Heating enabled, reduced
performance (higher outlet
temperature).
Heating enabled, reduced
performance (lower outlet
temperature).
Heating enabled; unit operates
as intended (lower outlet
temperature possible).
Heating enabled based on
default inlet temperature setting
(see default parameters table;
higher/lower outlet temperature
possible).
Heating enabled; auto calibration
disabled.
Heating disabled while condition
is present.
170°F
140°F
Possible solutions
- measure element resistance
with the unit completely turned off
- verify power supply (voltage)
while heater is running
- run water through the unit
- have certified personnel verify
the inlet voltage
- provide voltage within specified
range
- have certified personnel verify
the inlet voltage
- provide voltage within specified
range
- reduce flow (outlet flow
restrictor, faucet aerator)
- inspect connections/wiring of
inlet thermistor
- inspect connections/wiring of
outlet thermistor
- increase inlet water temperature
above 35°F
238-54367-00A REV 09/21
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