61
Yes
No
Yes
No
Yes
No
No
No
No
Yes
Yes
Yes
No
Yes
(3) Sequence of judgment
[04] Serial communication circuit of I/F interface PCB and INV PCB, TRS temperature switch circuit.
Check I/F PCB
whether there is serial signal sending to
the INV PCB
Check outdoor I/F PCB
Check I/F PCB
whether there is continuous signal coming
from the INV PCB
Check the condition of power interferenceand extraneous noise
Check outdoor INV PCB, TRS
[0b] Drain pump system of condensed water (float switch circuit of indoor PCB)
Whether the
connection of CN connector
is normal
Modify the connection
Whether the float switch act
Whether the
pin 5-7 in CN10 has
AC220V voltage
Modify wire andwiring loop
Check indoor PCB, ifimproper, replace it
Whether the
drain pump water acts
Check drain pump
Whether the
drain pump of is switched on
power
Check the loop,modify the circuit
Replace the drain pump.
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