Diagnosis And Solution - Heat Controller B-DVH09SD-0 Service Manual

DVC/DVH Inverter Mini-Split

10.3 Diagnosis and Solution

10.3.1 EEPROM Parameter Error Diagnosis and Solution (E0/F4)
Error Code
Malfunction
Possible Causes
Trouble shooting:
Shut off the power supply and
turn it on 5 seconds later. Is it
still displaying the error code?
Yes
If the EEPROM chip
If the EERPROM chip
is welded on main
is welded on main
PCB, replace the
PCB, replace the entire
main PCB directly.
main PCB. Otherwise,
Otherwise, check
check whether the
whether the
EEPROM chip is prop-
EEPROM chip
erly plugged in main
plugged in main PCB
PCB well?
well?
Yes
Replace the main PCB.
EEPROM: Has a read-only memory, whose contents can be erased and reprogrammed using a pulsed
voltage. For the location of EEPROM chip, please refer to the representative photos below.
Indoor PCB
E0/F4
Main PCB chip is not receiving feedback from EEPROM chip
(Indoor/Outdoor)
Installation error
●
Faulty PCB
●
No No further action.
No Correct the connection.
32
30
Heat Controller
Outdoor PCB