Daikin SkyAir RZR-TA Series Service Manual page 226

Troubleshooting by Error Codes
Troubleshooting
Note(s)
Note: If a PCB that does not have X15A connector detects A3 error code, the PCB is defective.
220
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
Is the drain pump
mechanism connected?
YES
Is a drain
pump connected to the
indoor unit PCB?
YES
Does the
drain pump work after
restarting operation?
NO
Set to "emergency" and check
the voltage of the connector
( 2) to which the drain pump is
connected.
Drain
pump voltage is in
accordance to the
criteria. ( 3)
NO
∗1: Float switch (S1L) /
Model
short circuit connector
FCQ-TA X15A
FBQ-P X15A
Is the
short circuit
NO
connector connected to the
indoor unit PCB?
( 1)
YES
Check the
continuity of short
.
circuit connector Is there
continuity?
YES
NO
Is the drain
YES
water level abnormally
high?
NO
Is the float
switch connected to the
indoor unit PCB?
( 1)
YES
Remove the float switch and
attach a jumper connector.
Then restart operation.
Error is
displayed again.
YES
YES
∗2: Drain pump (M1P)
connector
X10A
X25A
SiUS281811EA
NO
Short circuit connector
connection
NO
Replace the short circuit
connector.
Replace the indoor unit main
PCB (A1P).
Connect the drain pump.
YES
Drain system abnormality
NO
Connect the float switch (S1L).
Check if drain water is being
drained, and if the drain pipe is
not clogged.
NO
Replace the float switch (S1L).
Replace the indoor unit main PCB
(A1P).
Replace the drain pump.
Replace the indoor unit main
PCB (A1P).
∗3: Drain pump (M1P)
voltage
13 VDC
220-240 VAC
Part 6 Service Diagnosis