Daikin VRV Aurora RXLQ-TATJU Series, Service Manual

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SiUS341802EC Troubleshooting by Error Code
Part 6 Service Diagnosis 328
Note(s)
Troubleshooting
Is s u pply
v oltage im b alance o v er
approximately
12 V? (

1)
Correct the open phase of
power s
u pply.
Open phase?
Is the
im b alance of v oltage
applied to the in v erter o v er
approximately
12 V? (

2)
Rectify the power s u pply
v oltage im b alance.
Take co u ntermeas u res (listed
b elow).
YES YES
NO NO
NO
Take co u ntermeas u res.
Defecti v e noise filter, magnetic
relay, or wiring
T
u rn OFF the power s u pply,
and then check and repair
wirings in the main circ
u it and
defecti v e components.
(1) Loose contact and wiring
disconnection b etween the
power s u pply and the
in v erter
(2) Adhesion, meltdown, or
loose contact of magnetic
relay
(3) Wiring disconnection in or
loose contact of noise filter
Replace the in v erter PCB.
(*3)
YES
Explanation to u sers

Use the doc u ment “Notice of Inspection Res u lts” attached to spare part.
Hand the “Notice of Inspection Res u lts” to u ser to ask
him/her to rectify the im b alance.
Be s u re to explain u ser that “power s u pply
v oltage im b alance” will occ u r and Daikin
accepts no responsi b ility for the im b alance.
Use e qu ipment capa b le of constantly
recording power s u pply v oltages (e.g.
Memory HiCorder) to record power
s
u pply v oltages b etween phases (R-S,
S-T, and R-T) for a period of
consec
u ti v e 1 week.
Power s u pply v oltage im b alance
E v en tho u gh power s u pply v oltage
remains b alanced when making
meas u rement, it often b ecomes
im b alanced d u ring night-time (from
6:00 PM to 10:00 PM).
E v en tho u gh the power
s u pply v oltage is normal, the
error rec u rs.
<If v oltage can b e monitored>
Caution
Be s u re to t u rn off the power switch b efore connecting or disconnecting
connectors, or parts may b e damaged.
 1. Make measurement of voltage at the power supply terminal block (X1M).
 2. Make measurement of voltage at the L1, L2 and L3 terminals of diode module located on the
inverter PCB during the compressor is in operation.
 3. 208/230 V and 460 V models: A3P
575 V models: A4P