Daikin VRV IV Q+ Series Installation And Operation Manual page 41

Main code
Master
Auto charging related
RXYQQ8~20U7Y1B
VRV IV Q+ series heat pump
4P546221-1B – 2020.10
Sub code
Slave 1 Slave 2
Reversed power supply phase
malfunction
Reversed power supply phase
malfunction
INV1 voltage power shortage
INV1 power phase loss
INV2 voltage power shortage
INV2 power phase loss
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
▪ Bad wiring between outdoor and
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) Check if unit types are compatible.
Wrong unit combination (multi system) Check if unit types are compatible.
Auto address malfunction
(inconsistency)
Auto address malfunction
(inconsistency)
Stop valve closed or wrong (during
system test run)
— Unusual low pressure on suction line
— Freeze-up prevention indoor unit
— Automatic charging nearly finished
— Automatic charging finished
Cause
many indoor units
connected to F1/F2 line
indoor units
19 Troubleshooting
Solution
Correct phase order.
Correct phase order.
Check if power supply is within range.
Check if power supply is within range.
Check if power supply is within range
Check if power supply is within range.
Execute system test run.
Check (Q1/Q2) wiring.
Check (Q1/Q2) wiring.
Execute test run again.
Check Q1/Q2 wiring.
Check Q1/Q2 wiring.
are 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 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.
Close valve A immediately. Push BS1
to reset. Check following items before
retrying autocharge procedure:
▪ Check if the gas side stop valve is
opened correctly.
▪ Check if the valve of the refrigerant
cylinder is opened.
▪ Check if the air inlet and outlet of the
indoor unit are not obstructed.
Close valve A immediately. Push BS1
to reset. Retry autocharge procedure.
Prepare for autocharge stopping.
Finish autocharge mode.
Installation and operation manual
41