Daikin REYQ144TYDN - Page 45

423P362438-3H English
Malfunction code
Contents Solution
Main
code
Sub code
Master/sub 1/sub 2
JC
06/08/10 Low pressure sensor malfunction (S1NPL): open
circuit – A1P (X31A)
Check connection on printed circuit board or actuator.
07/09/11 Low pressure sensor malfunction (S1NPL): short
circuit – A1P (X31A)
Check connection on printed circuit board or actuator.
LC
14/15/16 Transmission outdoor unit
- inverter: A3P transmission trouble – A1P (X20A,
X28A)
• Check connection.
• Correct phase order.
19/20/21 Transmission outdoor unit
- inverter: A4P transmission trouble – inverter: A3P
(X41A): REYQ72
- inverter: A7P transmission trouble – inverter: A6P
(X41A): REYQ96-168
• Check connection.
24/25/26 Transmission outdoor unit
- inverter: A4P transmission trouble – inverter: A7P
(X4A): REYQ96-168
• Check connection.
30/31/32 Transmission outdoor unit
- inverter: A6P transmission trouble – inverter: A3P
(X41A, X61A): REYQ96-168
• Check connection.
• Correct phase order.
33/34/35 Transmission outdoor unit
- main printed circuit board: A1P transmission
trouble – sub printed circuit board: A8P (X2A)
• Check connection.
P1
01/02/03 INV1 unbalanced power supply voltage Check if power supply is within range.
07/08/09 INV2 unbalanced power supply voltage Check if power supply is within range.
U1
01/05/07 • Reversed power supply phase malfunction
• A12P: PRINTED CIRCUIT BOARD (OPEN
PHASE PROTECTION) malfunction–A1P(X36A):
REYQ72/144/168TYDN
• Correct phase order.
• Check connection.
• Check fuse.
04/06/08 Reversed power supply phase malfunction Correct phase order.
U2
01/08/11 INV1 voltage power shortage or open phase • Check if power supply is within range.
• Correct phase order.
02/09/12 INV1 reversed or open power supply phase • Check if power supply is within range.
• Correct phase order.
22/25/28 INV2 voltage power shortage or open phase • Check if power supply is within range.
• Correct phase order.
23/26/29 INV2 reversed or open power supply phase • Check if power supply is within range.
• Correct phase order.
U3
03
04
05
06
07
08
• Malfunction code: System test run not yet executed
(system operation not possible).
• Reversed or open power supply phase
• Faulty wiring to Q1/Q2 or indoor – outdoor
• Execute system test run.
• Correct phase order.
• Check (Q1/Q2) wiring.
U4
01 Faulty wiring to Q1/Q2 or indoor – outdoor Connect transmission wiring of BS unit and indoor unit
to “TO IN/D UNIT (F1, F2)” and transmission wiring of
other outdoor unit to “TO OUT/D UNIT (F1, F2)”.
03 Malfunction of connected indoor unit. Check the malfunction code of indoor unit and resolve it.
U7
01 Faulty wiring to Q1/Q2 or indoor – outdoor Connect transmission wiring of BS unit and indoor unit
to “TO IN/D UNIT (F1, F2)” and transmission wiring of
other outdoor unit to “TO OUT/D UNIT (F1, F2)”.
02 Faulty wiring to Q1/Q2 or indoor – outdoor Connect transmission wiring of BS unit and indoor unit
to “TO IN/D UNIT (F1, F2)” and transmission wiring of
other outdoor unit to “TO OUT/D UNIT (F1, F2)”.
11 • Too many indoor units are connected to F1/F2 line
• Faulty wiring between units
• Check indoor unit amount and total capacity con-
nected.
• Check connection.
U9
01 System mismatch. Wrong type of indoor units com-
bined (R407C, Mini-split, etc).
Indoor unit malfunction.
Check if other indoor units have malfunction and con-
rm indoor unit mix is allowed.
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