Daikin VRV IV Q+ Series Installer And User Reference Manual page 151

Main code
Master
Auto charging related
RXYQQ8~20U7Y1B
VRV IV Q+ series heat pump
4P546229-1A – 2020.10
Sub code
Slave 1 Slave 2
Cause
Malfunction code: System test
run not yet executed (system
operation not possible)
Faulty wiring to Q1/Q2 or
indoor - outdoor
Faulty wiring to Q1/Q2 or
indoor - outdoor
System test run abnormal
ending
Warning: faulty wiring to Q1/
Q2
Malfunction code: faulty
wiring to Q1/Q2
▪ Too many indoor units are
connected to F1/F2 line
▪ Bad wiring between outdoor
and indoor units
System mismatch. Wrong type
of indoor units combined
(R410A, R407C, RA, Hydrobox,
etc)
Indoor unit malfunction
Connection malfunction over
indoor units or type mismatch
(R410A, R407C, RA, Hydrobox,
etc)
Wrong unit combination
(multi system)
Wrong unit combination
(multi system)
Auto address malfunction
(inconsistency)
Auto address malfunction
(inconsistency)
Stop valve closed or wrong
(during system test run)
24 Troubleshooting
|
Solution
Execute system test run.
Check (Q1/Q2) wiring.
Check (Q1/Q2) wiring.
Execute test run again.
Check Q1/Q2 wiring.
Check Q1/Q2 wiring.
Check indoor unit amount and
total capacity connected.
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.
Check if unit types are
compatible.
Check if unit types are
compatible.
Check if transmission wired
unit amount matches with
powered unit amount (by
monitor mode) or wait till
initialisation is finished.
Check if transmission wired
unit amount matches with
powered unit amount (by
monitor mode) or wait till
initialisation is finished.
Open stop valves.
Installer and user reference guide
151