Daikin VRV IV Installer And User Reference Manual page 146

24 | Troubleshooting
Main code
Master
Auto charging related
Installer and user reference guide
146
Sub code
Slave 1 Slave 2
Cause
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)
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)
Solution
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 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.
RXMLQ8 + RXYLQ10~14T7Y1B*
VRV IV system air conditioner
4P543427-1A – 2020.10