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Installation and operation manual
47
RYYQ+RYMQ+RXYQ8~20T7Y1B
VRV IV System Air Conditioner
4P329765-1 – 2012.09
16. Operation of the unit
Once the unit is installed and test operation of outdoor unit and
indoor units is finished, the operation of the system can start.
For operating the indoor unit, the user interface of the indoor unit
should be switched ON. Refer to the indoor unit operation manual for
more details.
UF
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.
05
Stop valve closed or wrong (during system test run)
Open stop valves
INFORMATION
References can be found on the wiring diagram.
Malfunction code
Contents
Solution
Main
code
Sub code
Master/slave 1/slave 2
Information code
Contents
Solution
Main code
Auto charging related
P2
Unusual low pressure on suction line
Close valve A immediately. Push
BS3
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.
P8
Freeze-up prevention indoor unit
Close valve A immediately. Push
BS3
to reset. Retry
autocharge procedure.
PE
Automatic charging nearly finished
Prepare for autocharge stopping
P9
Automatic charging finished
Finish autocharge mode
Leak detection function related
E-1
Unit is not prepared to execute leak detection operation
Refer to requirements to be able to execute leak detection
operation.
E-2
Indoor unit is out of temperature range for leak detection
operation
Retry when ambient conditions are satisfied
E-3
Outdoor unit is out of temperature range for leak detection
operation
Retry when ambient conditions are satisfied
E-4
Too low pressure was noticed during leak detection operation
Restart leak detection operation
E-5
Indicates an indoor unit which is not compatible with leak
detection functionality is installed
Refer to requirements to be able to execute leak detection
operation.
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