P4-06-07-08 - Fin Thermistor Abnormality On Inverter Pcb A6P; P8-00 - Freeze-Up During Refrigerant Auto-Charge; P9-00 - Refrigerant Auto-Charge Finished Normally - Daikin VRV IV+ Service Manual

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Trigger Effect
Fan inverter PCB Unit will stop
A7P detects high operating.
temperature on
power module.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1 Perform a check of the fin thermistor of the PCB. See
"3.17 Thermistors" on page 128.
Possible cause: Faulty fin thermistor of the PCB.
1 Check the required space around the outdoor unit heat
exchanger. See "4.3 External factors" on
Possible cause: Insufficient air flow or air by‑pass due to
required space specifications not met.
2 Perform a check of the liquid cooling expansion valve. See
"3.5 Expansion valve" on page 89.
Possible cause: Faulty liquid cooling expansion valve.
3 Perform a check of the fan inverter PCB A7P. See
inverter PCB" on page 92.
Possible cause: Faulty fan inverter PCB A7P.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.99 P4-06-07-08 – Fin thermistor abnormality
on inverter PCB A6P
Main error code Sub error code
P4 06
07
08
INFORMATION
Main, Sub 1 and Sub 2 indications are relevant in multiple
outdoor unit configurations. Main outdoor unit is the unit to
which F1‑F2 IN transmission line is connected. Main, Sub
1 and Sub 2 outdoor units can be identified by field setting
1‑00.
Trigger Effect
Inverter PCB A6P Unit will stop
detects high operating.
temperature on
power module.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1 Perform a check of the fin thermistor of the PCB. See
"3.17 Thermistors" on page 128.
Possible cause: Faulty fin thermistor of the PCB.
1 Check the required space around the outdoor unit heat
exchanger. See "4.3 External factors" on
Possible cause: Insufficient air flow or air by‑pass due to
required space specifications not met.
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ Heat Pump
ESIE18-14 – 2019.07
2 Perform a check of the liquid cooling expansion valve. See
Reset
Manual reset via user
interface.
Automatic reset when
3 Perform a check of the inverter PCB A6P. See
fin temperature
drops.
2.3.100 P8-00 – Freeze-up during refrigerant auto-
Trigger
Very low
page 138.
temperatures
detected on indoor
unit coil during
refrigerant
auto‑charge.
To solve the error code
"3.6 Fan
1 Check for objects near the indoor unit that may block the
2 Clean the air filters of the indoor unit(s). See service manual of
3 Adjust external static pressure setting for ducted type indoor
Unit
Main
4 Restart refrigerant auto‑charge function. See installer reference
Sub 1
Sub 2
2.3.101 P9-00 – Refrigerant auto-charge finished
Trigger
Reset
This is not an error. It
Manual reset via user
indicates that
interface.
refrigerant
Automatic reset when
auto‑charge function
fin temperature
ended normally and
drops.
user may proceed
with test run.
To solve the error code
1 Proceed with test run.
page 138.
"3.5 Expansion valve" on page 89.
Possible cause: Faulty liquid cooling expansion valve.
PCB" on page 99.
Possible cause: Faulty inverter PCB A6P.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
charge
Effect
Auto-charge
operation will
terminate.
INFORMATION
It is recommended to perform the checks in the listed
order.
airflow. See "4.3 External factors" on
Possible cause: Airflow of the indoor unit is blocked.
the respective indoor unit(s).
Possible cause: Faulty or clogged air filter.
units, if necessary.
guide for more information.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
normally
Effect
-
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2 Troubleshooting
"3.8 Inverter
Reset
Push BS3 (return)
button once.
page 138.
Reset
Push BS1 (mode)
button once.
Service manual
49