34
Troubleshooting
Guide
On indoor unit central dis play:
ERROR
CODE
ERROR CODE
INDICATION
TROUBLE SHOOTING
E 0
OVER CURRENT OR
LOW CURRENT
PROTECTION
A. Check the voltage of input AC power is within normal
range. B. Check DC power voltage on outdoor unit main
PCB, if the voltage is lower than 150VDC, then replace the
outdoor unit main PCB; if the voltage is higher than
400VDC, then change PFC modular board, or change the
inverter modular board.
E 1
EEPROM ERROR
A. Check EEPROM chip on indoor unit PCB is loose, the
chip location on12KBUT/18KBTU model PCB is IC11, on
24KBTU/36KBT U model PCB is IC7; B. After step A, if unit
still displays error code E1, change the indoor unit PCB.
E 2
INDOOR UNIT
AMBIENT
TEMPERATURE
SENSOR FAILURE
A. Connection location on indoor unit PCB is:
CN11/
T1_ROOM
for 12kbtu/18kbtu,
CN20/ROOM /RT
for
24kbtu/36kbtu, replace with new sensor; B. after step A, if
unit still displays error code E2, change the indoor unit PCB.
E 3
INDOOR UNIT FAN
COIL TEMPERAT URE
SENSOR FAILURE
A. Connection location on indoor unit PCB is:
CN8/T2_PIPE
for 12kbtu/18kbtu,
CN19/PIPE/PT
for 24kbtu/36kbtu,
replace with new sensor; B. after step A, if unit still displays
error code E3, change the indoor unit PCB.
E 4
OUTDOOR UNIT FAN
COIL TEMPERAT URE
SENSOR FAILURE
A. Connection location on outdoor unit main PCB is:
CN15
PO\PG\PQ
for 12kbtu/18kbtu/ 24kbtu/36kbtu, PO is for
outdoor ambient temperature sensor, PG is for outdoor fan
coil temperature sensor, PQ is for outdoor unit discharge
gas temperature sensor. Replace with new sensor; B. after
step A, if unit still displays error code E4, change the
outdoor unit main PCB.
E 5
POWER OUTPUT TO
FAN MOTOR AT
INDOOR UNIT PCB
NOT DETECTED
Change indoor unit PCB.
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