Ecoer EODA18H-2436, Руководство по обслуживанию, Страница: 70 / 82

Manufacturer reserves the right to change specifications or designs without notice. 10.2019
ESI (Ultra) Service Manual
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1.
Error definition:
Data cannot be correctly received from the EEPROM to main chip.
EEPROM, a type of memory component, remembers contents even though power off.
2.
Possible causes:

Damaged main control board
1.
Error definition:
Power supply voltage is less than 175VAC.
2.
Possible causes:

Abnormal power supply voltage

Damaged main control board
1.
Error definition:
Cannot exit special control (start-up, oil return or defrost)
2.
Possible causes:

Abnormal signal input from thermostat
Display
EEPROM fault
Turn off the power supply for five minutes, then turn on the
power supply to check if the system goes back to normal?
YES
NO
Replace the main control board
External interference
(e.g. electromagnetic)
Display
Low voltage alarm
The power supply voltage is less than 175VAC.
Check the voltage between L1 and L2 (CN18&19).
YES
NO
Replace the main control board
Contact power supply agency to
verify that they are sending the
correct voltage.
Display
Abnormal function control
Turn off the power supply for five minutes, then turn on the
power supply to check if the system goes back to normal?
YES
NO
Contact Ecoer Service Team
Back to normal