Daikin VRV W T-Series Installation Manual page 47

Malfunction code
Main Sub code
code Master/sub 1/sub 2
01/08/11
U2
02/09/12
01
U3
05
06
07
08
01
U4
03
01
U7
02
03
01
U9
18
UA
20
27
01
UH
01
UF
Refer to service manual for full list of error codes.
RWEQ96~432TAYCU
VRV W T-Series water-cooled system air conditioner
4P540122-1B – 2018.11
Contents
Voltage power shortage.
Reversed or open power supply phase.
System test run not yet executed (system operation
not possible).
Test run aborted.
Test run aborted due to communication issues.
Faulty wiring to Q1/Q2 or indoor- outside.
Malfunction of connected indoor unit.
Faulty wiring to Q1/Q2 or indoor- outside.
▪ System mismatch. Wrong type of indoor units
combined (R407C, Mini-split, etc).
▪ Indoor unit malfunction.
Connection malfunction over indoor units or type
mismatch (R407C, Mini-split, etc).
Wrong combination of outside units (different series
(e.g. RWEQ and RWEYQ), or different type (e.g. P
type and T type)).
Assembly defect of indoor and outside units (e.g.
different models, number of units or part numbers, or
different series are mixed).
Auto address malfunction (inconsistency)
▪ Auto address malfunction (inconsistency)
▪ Stop valves closed.
10 Troubleshooting
Solution
▪ Check if power supply is within the range.
▪ Correct phase order.
▪ Check if power supply is within the range.
▪ Correct phase order.
Execute system test run.
Re-execute the test run.
Check the communication wires and re-execute the
test run.
Connect transmission wiring of indoor units to "TO
IN/D UNIT (F1, F2)" and transmission wiring of other
outside units to "TO OUT/D UNIT (F1, F2)".
Check the malfunction code of indoor unit and
resolve it.
Connect transmission wiring of indoor units to "TO
IN/D UNIT (F1, F2)" and transmission wiring of other
outside units to "TO OUT/D UNIT (F1, F2)".
Check if other indoor units have malfunction and
confirm indoor unit mix is allowed.
Check if other indoor units have malfunction and
confirm indoor unit mix is allowed.
Correct the units combination.
▪ Check and modify the number of indoor units that
are connected.
▪ Check the type of refrigerant for indoor and outside
units, and replace them with adaptable indoor/
outside units in the case of inconsistency.
Check if transmission wired unit amount matches
with powered unit amount (by monitor mode) or wait
till initialization is finished.
▪ Check if transmission wired unit amount matches
with powered unit amount (by monitor mode) or
wait till initialization is finished.
▪ Open stop valves.
Installation manual
47