Fault Codes - Bradford White RE2H50S 1NCTT Series Installation/Operation Instruction Manual

Fault Codes

Note: It's important to note that fault codes should only be used to help identify components which require
testing. Never replace a part based solely on a fault code. The control can generate a false fault if the right
conditions exist. Contact a certified technician to assess and repair the water heater based on the fault codes.
Fault Code Fault Counts Before
Displayed Code Displayed
FC
Fd
FE
FF
FG
FI*
FJ
FL
F2
F3
F4
F5
F6
F7
*On some models
Control checks to ensure evaporator is free of frost. Continuously
10 verifies that T3a sensor (evaporator inlet temperature) is greater than
20°F 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
10
(evaporator inlet temperature) and T3b sensor (evaporator outlet
temperature) is greater than 5°F after 30 minutes of run time. Control
also verifies that T3a is greater than 10°F less than T5 ambient sensor.
Control checks to ensure the compressor discharge temperature never
10 exceeds 240°F. Continuously verifies that T4 sensor (compressor outlet
temperature) is less than 240°F every minute of run time.
Control checks to ensure the EEV is operating properly and valve
10
rotation is within range.
Control checks to ensure ambient temperature is within an acceptable
range before starting heat pump. Heat pump operating range is
35°F < [T5 ambient] < 120°F. If ambient temperature (as viewed by T5
10
sensor) is outside of this range, the water heater 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 <20°F AND the EEV
position is <450 after 30 minutes of run time. If outside these limits, this
10 provides an early indication of a refrigerant leak. (Note: Target
superheat is generally 10°F, 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
10 compressor and lower heating element are both enabled. If current
draw is > 20.5A, the compressor will be disabled.
Control checks to ensure that T3 and T3b evaporator inlet and outlet
10 temperatures are within 2.5°F of the T5 ambient temperature 20
minutes after defrost begins.
T2 tank temperature sensor failure. Just before compressor starts,
1
control checks T2 sensor is within 30°F - 170°F temperature range.
Compressor failure. Control energizes compressor, but current sensor
10
detects no current flow.
10 Fan failure.
T3a sensor (evaporator inlet temperature) failure. The control detects
10
the thermistor output is at or nearly shorted or open circuit.
T3b sensor (evaporator outlet temperature) failure. The control detects
10
the thermistor output is at or nearly shorted or open circuit.
T4 sensor (compressor outlet) failure. The control detects the
10
thermistor output is at or nearly shorted or open circuit.
Condition
28