Rotenso J100Wi, Service Manual

Page: 96 / 132

LCAC R32 Series
96 Service manual
4.1.3 Indoor EEPROM Malfunction
Malfunction conditions Main PCB chip does not receive feedback from EEPROM chip
Possible causes
• Installation mistakes
• Faulty PCB
EEPROM
: An electrically erasable programmable read-only memory whose contents can be erased and reprogrammed
using a pulsed voltage.
Yes
Replace the indoor main PCB
Power off,then restart the
unit 2 minutes later.Does a
problem remain?
Isthewater-level
switch inserted
properly?
Insert the water-level switch
properly
Isthewater-level
switchbroken?
Replace the water-level switch
Replace the water pump. Is
the malfunction still not
resolved?
Yes
No
Yes
Replace the indoor main PCB
Power off, then restart the unit 2 minutes
later. Is it still displaying the errorcode?
Yes
No
Yes
Yes
Replace the indoor main PCB
Power off,then restart the
unit 2 minutes later.Does a
problem remain?
Isthewater-level
switch inserted
properly?
Insert the water-level switch
properly
Isthewater-level
switchbroken?
Replace the water-level switch
Replace the water pump. Is
the malfunction still not
resolved?
Yes
No
Yes
Replace the indoor main PCB
Power off, then restart the unit 2 minutes
later. Is it still displaying the errorcode?
Yes
No
Yes
4.1.4 Water-Level Alarm Malfunction
Malfunction conditions
If the sampling voltage is not 5V, the LED will display the failure code.
Possible causes
• Wiring mistakes
• Faulty water-level switch
• Faulty water pump
• Faulty indoor PCB
PART 6. TROUBLESHOOTING