F3-01-03-05 - Compressor Discharge Temperature Too High; F3-20-21-22 - Compressor Body Temperature Too High - Daikin VRV IV+ Service Manual

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Possible cause:
▪ Faulty or disturbance of the power supply (imbalance
>10%),
▪ Power drop,
▪ Short circuit.
7 Perform a power reset. If the error disappears and is raised
again after a while, check for the presence of an external
source causing electrical noise. See
page 138.
Possible cause: External source may cause interference.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.31 F3-01-03-05 – Compressor discharge
temperature too high
Main error code Sub error code
F3 01
03
05
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
Discharge Unit will stop
temperature >safety operating.
value certain times
within certain
minutes, see
"6.6 Safety
devices" on
page 183.
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 Perform a check of the discharge pipe thermistor. See
"3.17 Thermistors" on page 128.
Possible cause: Faulty discharge pipe thermistor or
connector fault.
3 Perform a check of the main PCB. See
page 106.
Possible cause: Faulty main PCB.
4 Check if the refrigerant circuit is correctly charged. See
"4.2 Refrigerant circuit" on page 133.
Possible cause: Refrigerant shortage.
5 Perform a check of the compressor. See
page 82.
Possible cause: Faulty compressor.
6 Perform a check of the main expansion valve. See
"3.5 Expansion valve" on page 89.
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ Heat Pump
ESIE18-14 – 2019.07
"4.3 External factors" on
Unit
Main
Sub 1
Sub 2
Reset
Manual reset via user
interface.
Automatic reset when
discharge
temperature <reset
value, see "6.6 Safety
devices" on
page 183.
page 133.
"3.9 Main PCB" on
"3.2 Compressor" on
Possible cause: Faulty main expansion valve.
7 Perform a check of the expansion valve(s) of the indoor unit(s).
See service manual of the respective indoor unit(s) for more
information.
Possible cause: Faulty indoor unit expansion valve.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.32 F3-20-21-22 – Compressor body
temperature too high
Main error code Sub error code
F3 20
21
22
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
Body temperature Unit will stop
>safety value certain operating.
times within certain
minutes, see
"6.6 Safety
devices" on
page 183.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1 Perform a check of the compressor body thermistors. See
"3.17 Thermistors" on page 128.
Possible cause: Faulty compressor body thermistor or
connector fault.
2 Perform a check of the main PCB. See
page 106.
Possible cause: Faulty main PCB.
3 Check if the refrigerant circuit is correctly charged. See
"4.2 Refrigerant circuit" on page 133.
Possible cause: Refrigerant shortage.
4 Perform a check of the compressor. See
page 82.
Possible cause: Faulty compressor.
5 Perform a check of the main expansion valve. See
"3.5 Expansion valve" on page 89.
Possible cause: Faulty main expansion valve.
6 Perform a check of the expansion valve(s) of the indoor unit(s).
See service manual of the respective indoor unit(s) for more
information.
Possible cause: Faulty indoor unit expansion valve.
2 Troubleshooting
Unit
Main
Sub 1
Sub 2
Reset
Manual reset via user
interface.
Automatic reset when
body temperature
<reset value, see
"6.6 Safety
devices" on
page 183.
"3.9 Main PCB" on
"3.2 Compressor" on
Service manual
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