54
9.2 Diagnosis and Solution
9.2.1 EEPROM parameter error diagnosis and solution
If the EEPROM chip
is welded on main
PCB, replace the
main PCB directly.
Otherwise, check
whether the
EEPROM chip
plugged in main PCB
well?
Yes
No
Yes
Correct the connection.
Replace the indoor main
PCB.
Shut off the power supply and
turn it on 5 seconds later. Is it
still displaying the error code?
EEPROM: a read-only memory whose contents can be erased and reprogrammed using a pulsed
voltage.
9.2.2 Zero crossing detection error diagnosis and solution
Check if the connections and
power supply is normal?
Correct the connections. Turn on the
unit when the power supply is good.
No
Yes
Indoor main PCB is
defective. Replace indoor
main PCB.
Summary of Contents for MA9A-24HR-QB4W
Page 19: ...17 MS9A 18CR QB6...
Page 20: ...18 MS9A 18CR PC4W A MS9A 05CR QD0 MS9A 09CR QB6 A MS9A 09CR QB6 MS9A 09CR QC0 MS9A 09CR QC4 A...
Page 21: ...19 MS9A 12CR QC4 A MS9A 18CR QC0 MS9A 18CR QC2 MS9A 18CR QB8 MS9A 18CR QC4 A MS9A 18CR QC0 A...
Page 22: ...20 MS9A 21HR QB6W MA9A 24HR QB4W MS9A 22CR QC0 MS9A 22CR QB8...
Page 23: ...21 5 2 Outdoor Units MOK2 07C QB6 MOK6 09C QB6 MOA1 12C QB6 MOA2 12C QB6...
Page 24: ...22 MOB 18C QB6...
Page 25: ...23 MOK 07H QB6 MOK3 09H QB6 MOB 12H QB6 MOA1 12H QB4 MOA2 12H QB6...
Page 27: ...25 MOB3 18C QB8 MOC2 18C QC0 MOB1 18CP QC0 MOB2 18CP QC0...
Page 28: ...26 MOB 18H QB6...
Page 29: ...27 MOF 18C QC4W MOF4 21H QB6W...
