Bradford White RE2H50S 1NCTT Series Installation/Operation Instruction Manual page 29

Fault codes cont.-
Fault Code Fault Counts Before
Displayed Code Displayed
F8
F9
F10
F11
bAd linE
F12
F13
Dirty Filter
(F14)
F15
F16*
F17*
F18
F19
F20
F21
F22
F23
F24
*On some models
T5 sensor (ambient temperature) failure. The control detects the
10
thermistor output is at or nearly shorted or open circuit.
Lower heating element failure. Control energizes lower element, but
10
current sensor detects no current flow.
Upper heating element failure. Control energizes upper element, but
10
current sensor detects no current flow.
Dry tank fault. This test is run within the first 22 minutes after the water
heater has powered on (The compressor is engaged for 20 minutes
after a 2 minute wait for the system to allow the high and low side
1 pressures to equalize). The tank temperature, T2, is read and verified it
has not risen more than 5°F. If it has, this indicates there is not enough
water in the tank for water heater operation. After 1 failed dry tank test,
"F11" is displayed. After 5 failed tests, an audible alarm will sound.
The voltage is too low at power-up. The control monitors the input line
1 voltage one minute after power-up, and if the voltage is below 155
VAC, the fault code will be displayed.
Stuck key fault. This indicates there is a button on the front panel that is
1 stuck down. This button is inoperable. Other buttons work normally. If
the button becomes free, the fault code will clear by itself.
Filter LED is on, and audible alarm is sounding. Filter is too dirty to
enable proper function of water heater. Number of "Dirty Filter" counts
5 are stored in the "F14" code and can be monitored via the control when
it is place in Diagnostics Mode. The evaporator is operating at a colder
temperature than the ambient temperature as measure by T5.
DataFlash fault. The microcontroller has detected a problem in the
10
DataFlash (permanent memory storage).
Anode Depleted. Anode LED is on, and the audible alarm is sounding.
The control has calculated that the anode rod has been mostly
1
consumed, or the time in operation has exceeded the replacement
timeline threshold.
Anode Depletion miswire condition or shorted to ground. The control
1 has detected that the anode circuit has a corrosion current signal
≤0.25mA.
Current transformer miswired. F3, F9, and F10 fault codes have all
10
occurred during the same heating cycle.
10 Low line voltage.
Condensate drain port blocked. Water heater will only operate in
10 standard/electric mode until the drain port is cleared and the sensor is
no longer in contact with water.
Application Update Failure. A problem occurred while updating the
1
control application.
Parametric Data Update Failure. A problem occurred while updating
1
parametric data.
Micro A/D Failure. The control has detected a microcontroller input port
10
has failed.
T1 tank temperature sensor failure. Just before compressor starts,
1
control checks T1 sensor is within 30°F - 170°F temperature range.
Condition
29