8
No.
Content
0-
Setting temperature
1-
Indoor temperature (T1),
2-
Indoor unit evaporator temperature (T2 or T2B)
3-
EEPROM code
4-
Software code
5-
Outdoor unit error code
6-
Outdoor unit running frequency
7-
Outdoor unit condenser temperature (T3)
8-
Outdoor ambient temperature (T4)
9-
Indoor unit fan speed (f0 means 1500rpm, a1 means 1010rpm)
2
.4 Troubleshooting by error code
Indoor unit error
2
.4.1 E1 (IDU) Communication failure between indoor and outdoor unit
Description
: the indoor unit didn’t receive feedback from outdoor unit within 1 minute.
Possible reason
:
Bad connection of communication wire
Fault indoor or outdoor unit PCB
Troubleshooting and repair:
a)
Check if the wiring connection between outdoor and indoor unit is loose.
b)
Power off and then repower on the unit after 3 minutes. If error code disappear, problem is solved.
If not, go to next step.
c)
Measure the DC voltage between P and N on back of the main PCB with multi meter.
2
.4.2 E2, E3, E4 (IDU) temperature sensor fault
Description:
the sampling voltage is lower than 0.06V or higher than 4.94V.
Possible reason:
Open circuit or short circuit of relevant port.
Faulty temperature sensor
