RYYQ+RYMQ+RXYQ8~20T7Y1B
VRV IV System Air Conditioner
4P329765-1 – 2012.09
Installation and operation manual
46
J3
16/22/28
Discharge temperature sensor malfunction (R21T): open
circuit - A1P (X29A)
Check connection on PCB or actuator
17/23/29
Discharge temperature sensor malfunction (R21T): short
circuit - A1P (X29A)
Check connection on PCB or actuator
18/24/30
Discharge temperature sensor malfunction (R22T): open
circuit - A1P (X29A)
Check connection on PCB or actuator
19/25/31
Discharge temperature sensor malfunction (R22T): short
circuit - A1P (X29A)
Check connection on PCB or actuator
47/49/51
Compressor casing temperature sensor malfunction (R8T):
open circuit - A1P (X29A)
Check connection on PCB or actuator
48/50/52
Compressor casing temperature sensor malfunction (R8T):
short circuit - A1P (X29A)
Check connection on PCB or actuator
J5
01/03/05
Suction temperature sensor malfunction (R3T) - A1P (X30A)
Check connection on PCB or actuator
J6
01/02/03
De-icing temperature sensor malfunction (R7T) - A1P (X30A)
Check connection on PCB or actuator
J7
06/07/08
Liquid temperature sensor (after subcool HE) malfunction
(R5T) - A1P (X30A)
Check connection on PCB or actuator
J8
01/02/03
Liquid temperature sensor (coil) malfunction (R4T) - A1P
(X30A)
Check connection on PCB or actuator
J9
01/02/03
Gas temperature sensor (after subcool HE) malfunction (R6T)
- A1P (X30A)
Check connection on PCB or actuator
JA
06/08/10
High pressure sensor malfunction (S1NPH): open circuit -
A1P (X32A)
Check connection on PCB or actuator
07/09/11
High pressure sensor malfunction (S1NPH): short circuit -
A1P (X32A)
Check connection on PCB or actuator
JC
06/08/10
Low pressure sensor malfunction (S1NPL): open circuit - A1P
(X31A)
Check connection on PCB or actuator
07/09/11
Low pressure sensor malfunction (S1NPL): short circuit - A1P
(X31A)
Check connection on PCB or actuator
LC
14
Transmission outdoor unit - inverter: INV1 transmission
trouble - A1P (X20A, X28A, X40A)
Check connection
19
Transmission outdoor unit - inverter: FAN1 transmission
trouble - A1P (X20A, X28A, X40A)
Check connection
24
Transmission outdoor unit - inverter: FAN2 transmission
trouble - A1P (X20A, X28A, X40A)
Check connection
30
Transmission outdoor unit - inverter: INV2 transmission
trouble - A1P (X20A, X28A, X40A)
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
Correct phase order
04/06/08
Reversed power supply phase malfunction
Correct phase order
U2
01/08/11
INV1 voltage power shortage
Check if power supply is within range
02/09/12
INV1 power phase loss
Check if power supply is within range
22/25/28
INV2 voltage power shortage
Check if power supply is within range
23/26/29
INV2 power phase loss
Check if power supply is within range
U3
03
• Malfunction code: System test run not yet executed
(system operation not possible)
• Warning indication: Leak detection or refrigerant amount
check not performed (system operation possible)
• Execute system test run
• Execute autocharge function (see manual); unit not ready
for leak detection functionality
U4
04
System test run abnormal ending
Execute test run again
01
Faulty wiring to Q1/Q2 or indoor - outdoor
Check (Q1/Q2) wiring
03
Faulty wiring to Q1/Q2 or indoor - outdoor
Check (Q1/Q2) wiring
U7
01
Warning: faulty wiring to Q1/Q2
Check Q1/Q2 wiring
02
Malfunction code: faulty wiring to Q1/Q2
Check Q1/Q2 wiring
11
• Too many indoor units are connected to F1/F2 line
• Bad wiring between outdoor and indoor units
Check indoor unit amount and total capacity connected
U9
01
System mismatch. Wrong type of indoor units combined
(R410A, R407C, RA, Hydrobox, etc).
Indoor unit malfunction.
Check if other indoor units have malfunction and confirm
indoor unit mix is allowed.
UA
03
Connection malfunction over indoor units or type mismatch
(R410A, R407C, RA, Hydrobox, etc).
Check if other indoor units have malfunction and confirm
indoor unit mix is allowed.
18
Connection malfunction over indoor units or type mismatch
(R410A, R407C, RA, Hydrobox, etc).
Check if other indoor units have malfunction and confirm
indoor unit mix is allowed.
31
Wrong unit combination (multi system)
Check if unit types are compatible
49
Wrong unit combination (multi system)
Check if unit types are compatible
UH
01
Auto address malfunction (inconsistency)
Check if transmission wired unit amount matches with
powered unit amount (by monitor mode) or wait till
initialisation is finished.
Malfunction code
Contents
Solution
Main
code
Sub code
Master/slave 1/slave 2
Summary of Contents for RYYQ8T7Y1B
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