Daikin VRV IV+ Installer And User Reference Manual page 158

24 | Troubleshooting
Main code
Master
Installer and user reference guide
158
Sub code
Slave 1 Slave 2
,
,
,
Cause
INV1 unbalanced power supply
voltage
INV2 unbalanced power supply
voltage
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)
An error occurred during the
test run
Test run aborted
Test run aborted due to
communication issues
Faulty wiring to Q1/Q2 or
indoor - outdoor
Indoor unit communication
error
Malfunction code: faulty wiring
to Q1/Q2
Too many indoor units are
connected to F1/F2 line
System mismatch. Wrong type
of indoor units combined
(R410A, R407C, Hydrobox, etc)
Indoor unit malfunction
Solution
Check if power supply is within
range.
Check if power supply is within
range.
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.
Re-execute the test run.
Re-execute the test run.
Check the communication wires
and re-execute the test run.
Check (Q1/Q2) wiring.
Check user interface
connection.
Check Q1/Q2wiring.
Check indoor unit amount and
total capacity connected.
Check if other indoor units have
malfunction and confirm indoor
unit mix is allowed.
REYQ8~20+REMQ5U7Y1B
VRV IV+ heat recovery
4P561154-1A – 2020.10