A.O. Smith ADMR-40 Installation, User And Service Manual page 76

Symptom Cause
C02 (lock out error) Incorrect reference
voltage from the AD
Error message from the converter.
appliance controller.
Internal error message • EEPROM read
from the appliance
error
controller.
• 50 Hz error
• Internal
communication
error
Internal error message • Gas valve relay
from the appliance
error
controller.
• Safety relay error
• Ignition relay error
• RAM error
• EEPROM error
• EEPROM contents
do not match the
software version
C03 (blocking error) Too many resets in too
short a period.
Reset error
C04 (blocking error) Incorrect appliance
selection / Incorrect
selection resistor.
Appliance selection
error
Instruction manual ADMR
Solution
1. Reset electronic controller.
2. Check that the frequency of the power supply is
compliant (3.4.2 "General and electrical
is not the case, contact your installation engineer
3. If the frequency is correct but the error persists, replace the
electronic controller.
Wait for the error to disappear (maximum 1 hour). If the error does
not disappear, replace the appliance controller.
1. Check whether the correct appliance is selected
the selected appliance").
2. If the correct appliance is selected, fit the correct selection
resistor.
3. If incorrect appliance selected, select the correct one.
Remark
To replace the necessary parts, you must contact your installation
engineer
specifications"). If this
To replace the necessary parts, you must contact your installation
engineer
(12.5 "Display If the error cannot be resolved or is persistent, contact your
installation engineer
To replace the necessary parts, you must contact your installation
engineer
is
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