Wiring And Piping Mismatch - Excess Connection Ratio; 2.3.155 Uh-01-02 - Auto-Address Failure; Refrigerant Leak Check Is Not Possible - Daikin VRV IV+ Service Manual

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3 Set field setting 2‑5 of the outdoor unit to 1 to start the indoor
units connected to that outdoor unit on forced fan operation,
see "6.9 Field settings" on page 188. If any of these indoor units
is NOT operating, check the indoor unit(s) that have power
black‑out or malfunctioning PCB. See service manual of the
respective indoor unit for more information.
Possible cause: Power black‑out or malfunctioning PCB on
indoor unit(s).
4 Check field setting 1‑10 to count the indoor units, see
settings" on page 188. If less indoor units detected than it
should be, check the indoor unit(s) that have power black‑out or
malfunctioning PCB. See service manual of the respective
indoor unit for more information.
Possible cause: Power black‑out or malfunctioning PCB on
indoor unit(s).
5 Perform a check of the indoor unit pipe thermistors, see service
manual of the respective indoor unit(s) for more information.
Possible cause: Faulty indoor unit pipe thermistor.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.154 UF-11 – Wiring and piping mismatch -
Excess connection ratio
Trigger Effect
Minimum 1 indoor Forced stop.
unit fails to perform
cross pipe check
during test run.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1 Check that all stop valves of the refrigerant circuit are open.
See "4.2 Refrigerant circuit" on
Possible cause: Closed stop valve in the refrigerant circuit.
2 Check that the refrigerant circuit piping and wiring connections
of the system are correctly installed.
Possible cause: Refrigerant piping and/or wiring mismatch.
3 Set field setting 2‑5 of the outdoor unit to 1 to start the indoor
units connected to that outdoor unit on forced fan operation,
see "6.9 Field settings" on page 188. If any of these indoor units
is NOT operating, check the indoor unit(s) that have power
black‑out or malfunctioning PCB. See service manual of the
respective indoor unit for more information.
Possible cause: Power black‑out or malfunctioning PCB on
indoor unit(s).
4 Check field setting 1‑10 to count the indoor units, see
settings" on page 188. If less indoor units detected than it
should be, check the indoor unit(s) that have power black‑out or
malfunctioning PCB. See service manual of the respective
indoor unit for more information.
Possible cause: Power black‑out or malfunctioning PCB on
indoor unit(s).
5 Perform a check of the indoor unit pipe thermistors, see service
manual of the respective indoor unit(s) for more information.
Possible cause: Faulty indoor unit pipe thermistor.
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ Heat Pump
ESIE18-14 – 2019.07
"6.9 Field
Reset
Perform test run.
page 133.
"6.9 Field
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.155 UH-01-02 – Auto-address failure
Trigger Effect
Main PCB detects Forced stop.
improper combination
at indoor unit side.
Missing auto address
of indoor unit(s) after
initialization.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1 Set field setting 2‑5 of the outdoor unit to 1 to start the indoor
units connected to that outdoor unit on forced fan operation,
see "6.9 Field settings" on page 188. If any of these indoor units
is NOT operating, check the indoor unit(s) that have power
black‑out or malfunctioning PCB. See service manual of the
respective indoor unit for more information.
Possible cause: Power black‑out or malfunctioning PCB on
indoor unit(s).
2 Perform a communication reset of the F1‑F2 transmission, see
"4.1 Electrical circuit" on page 130.
3 Check field setting 1‑10 to count the indoor units, see
settings" on page 188. If less indoor units detected than it
should be, check the indoor unit(s) that have power black‑out or
malfunctioning PCB. See service manual of the respective
indoor unit for more information.
Possible cause: Power black‑out or malfunctioning PCB on
indoor unit(s).
4 Check if the power supply is conform with the regulations. See
"4.1 Electrical circuit" on page 130.
Possible cause:
▪ Faulty or disturbance of the power supply (imbalance
>10%),
▪ Power drop,
▪ Short circuit.
5 Check the F1‑F2 transmission line between the indoor units and
outdoor unit. See "4.1 Electrical circuit" on
Possible cause: Faulty or interruption in transmission line
between indoor units and outdoor unit.
6 Check for improper combination of units. See the combination
table in the Databook for more information. Change the
installation with ONLY compatible type units.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.156 E-1 – Refrigerant leak check is not
possible
Trigger Effect
Total refrigerant Unit will stop
judgement is operating.
unknown.
2 Troubleshooting
Reset
Reset communication
from main PCB.
"6.9 Field
page 130.
Reset
Manual reset via user
interface.
Service manual
65