Bradford White RE2H50R10B-1NCWT Manuel D'utilisation Et D'installation page 21

Fault codes.
fault fault Condition
Code Counts
dis- Before
played Code
dis-
played
Control checks to ensure evaporator is free of frost.
FC 10 Continuously verifies that T3a sensor (evaporator inlet tem-
perature) is greater than 20F after 30 minutes of run time.
Control checks to ensure evaporator superheat* is OK
(controlled by EEV). Continuously verifies the temperature
difference between T3a sensor (evap inlet temp) and T3b
Fd 10
sensor (evap outlet temp) is greater than 5F after 30 mins of
run time. Control also verifies that T3a is greater than 10F
less than T5 ambient sensor.
Control checks to ensure the compressor discharge
temperature never exceeds 240F. Continuously verifies that
FE 10
T4 sensor (compressor outlet temperature) is less than 240F
every minute of run time.
Control checks to ensure the EEV is operating properly and
FF 10 valve rotation is within range.
Control checks to ensure Ambient temperature is within an
acceptable range before starting heat pump. Heat pump
operating range is 35ºF < [T5 ambient] <120ºF. If ambient
FG 10
temperature (as viewed by T5 sensor) is outside of this range,
the unit will switch to Electric/Standard Mode for that
heating cycle only. NO fault code is shown on the display.
Control checks to ensure evaporator superheat is <20ºF
AND the EEV position is <450 after 30 minutes of run time. If
FI* 10 outside these limits, this provides an early indication of a re-
frigerant leak. (Note: Target superheat is generally 10ºF, and
EEV generally operates at a position much lower than 450.)
Control checks to ensure that the AC current draw is
<= 20.5A while the compressor and lower heating element
FJ 10
are both enabled. If current draw is >20.5A, the compressor
will be disabled.
Control checks to ensure that T3a and T3b evaporator inlet
FL 10 and outlet temperatures are within 2.5ºF of the T5 ambient
temperature 20 minutes after defrost begins.
T2 tank temperature sensor failure Just before compressor
F2 1 starts, control checks T2 sensor is within 30F - 170F
temperature range.
Compressor failure. Control energizes compressor, but
current sensor detects no current flow.
F3 10
F4 10 Fan Failure
T3a sensor (evap inlet temperature) failure. The control
F5 10 detects the thermistor output is at or nearly shorted or open
circuit.
T3b sensor (evap outlet temperature) failure. The control
F6 10 detects the thermistor output is at or nearly shorted or open
circuit.
T4 sensor (compressor outlet) failure. The control detects the
F7 10 thermistor output is at or nearly shorted or open circuit.
* Some Models
Check
Check T3a sensor mounting, wiring and resistance.
Check Electronic Expansion Valve (EEV) operation.
Check sealed system for refrigerant leak.
Check that filter is clean. Check T3a, T3b and T5 sensor
mounting, wiring and resistance.
Check Electronic Expansion Valve (EEV) operation.
Check sealed system for refrigerant leak.
Check T4 sensor mounting, wiring and resistance.
Check Electronic Expansion Valve (EEV) operation.
Check sealed system for refrigerant leak.
Check Electronic Expansion Valve (EEV) operation.
Check T3a and T3b sensors mounting, wiring and
resistance. Check sealed system for refrigerant leak.
No failure is assumed, but this information is provided for
completeness.
Check sealed system for refrigerant leak.
Check T3a, T3b, T5 sensor mounting, wiring and resistance.
Check Electronic Expansion Valve (EEV) operation.
Check lower heating element rated wattage. Element
wattage is stamped on the heating element terminal block.
Correct wattage can be found on the water heater's rating
plate.
Check T3a, T3b, T5 sensor mounting, wiring and resistance.
Check Electronic Expansion Valve (EEV) operation.
Check T2 sensor mounting, wiring and resistance.
Use service mode to monitor T2 sensor temperature.
Control assembly may have failed.
Check compressor run capacitor.
Check compressor, overloads, relay and wiring.
Use service mode to manually cycle compressor on/off.
Check fan and wiring.
Check T3a sensor mounting, wiring and resistance.
Use service mode to monitor T3a sensor temperature.
Control assembly may have failed.
Check T3b sensor mounting, wiring and resistance.
Use service mode to monitor T3b sensor temperature.
Control assembly may have failed.
Check T4 sensor mounting, wiring and resistance.
Use service mode to monitor T4 sensor temperature.
Control assembly may have failed.
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