38MBR: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
22
Indoor / Outdoor Unit's Communication Error - Diagnosis and Solution (E1)
Troubleshooting
Error Code
E1
Malfunction decision conditions
Indoor unit does not receive feedback from outdoor unit for 60 seconds, or the outdoor unit does not receive
feedback from indoor unit for 120 seconds.
Supposed Causes
• Wiring mistake
• Faulty indoor or outdoor PCB
E1 displayed
Is there any interference such as
too many lamps or powertransformers?
Or is the signal wire too long?
Yes
ŽŵŵƵŶŝĐĂƟŽŶŵĂůĨƵŶĐƟŽŶďĞƚǁĞĞŶƚŚĞ
indoor and outdoor units
Power
OFF
.
Wait 2 minutes then restart the unit.
ŽĞƐƚŚĞƉƌŽďůĞŵƐƟůůĞdžŝƐƚ͍
/ƐƚŚĞƐŝŐŶĂůǁŝƌĞĂƐŚŝĞůĚĐĂďůĞ
ĂŶĚŝƐƚŚĞƐŚŝĞůĚĐĂďůĞĂĞĂƌƚŚŝŶŐ͍
No
Yes
/ƐƚŚĞƐŝŐŶĂůǁŝƌĞďƌŽŬĞ͍
No
Are the signal wires
properly inserted on the PCB?
Replace the indoor main PCB.
Is the error resolved?
Yes
No
Replace the outdoor main PCB.
Remove the interference or add
a magnet ring on the power wire.
Yes
ĚŽƉƚĂƐŚŝĞůĚĐĂďůĞͬƐŚŝĞůĚĐĂďůĞĞĂƌƚŚŝŶŐ͘
No
Replace the signal wire.
Yes
Pull out and re-insert.
No
