E5-07-08-09 - Compressor Overload Error; E6-17-19-21 - Inverter Overcurrent Error - Daikin VRV IV+ Service Manual

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10 Perform a check of the 4‑way valve. See
page 77.
Possible cause: Faulty 4‑way valve.
11 Perform a check of the discharge pipe thermistor. See
"3.17 Thermistors" on page 128.
Possible cause: Faulty discharge pipe thermistor or
connector fault.
12 Perform a check of the inverter PCB A3P. See
PCB" on page 99.
Possible cause: Faulty inverter PCB A3P.
13 Perform a check of the main PCB. See
page 106.
Possible cause: Faulty main PCB.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.13 E5-07-08-09 – Compressor overload error
Main error code Sub error code
E5 07
08
09
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
Compressor overload Unit will stop
is detected for M2C. operating.
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 if the refrigerant circuit is clogged. See
circuit" on page 133.
Possible cause: Clogged refrigerant circuit.
3 Perform a check of the oil return valve Y2S. See
valve" on page 112.
Possible cause: Faulty oil return valve Y2S.
4 Perform a check of the oil return valve Y3S. See
valve" on page 112.
Possible cause: Faulty oil return valve Y3S.
5 Perform a check of the oil return valve Y4S. See
valve" on page 112.
Possible cause: Faulty oil return valve Y4S.
6 Check if there are oil traps in the field piping. See installation
manual for piping rules.
Possible cause: Compressor running without oil will draw
higher current and get locked.
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ Heat Pump
ESIE18-14 – 2019.07
"3.1 4-way valve" on
"3.8 Inverter
"3.9 Main PCB" on
Unit
Main
Sub 1
Sub 2
Reset
Manual reset via user
interface.
page 133.
"4.2 Refrigerant
"3.11 Oil return
"3.11 Oil return
"3.11 Oil return
7 Perform a check of the compressor. See
page 82.
Possible cause: Faulty compressor.
8 Check liquid back issue. Check expansion valve operation. See
"3.5 Expansion valve" on page 89.
Possible cause: Expansion valve CANNOT keep minimum
superheat of 3 K while running as evaporator.
9 Check if the refrigerant circuit is correctly charged. See
"4.2 Refrigerant circuit" on page 133.
Possible cause: Refrigerant shortage.
10 Perform a check of the 4‑way valve. See
page 77.
Possible cause: Faulty 4‑way valve.
11 Perform a check of the discharge pipe thermistor. See
"3.17 Thermistors" on page 128.
Possible cause: Faulty discharge pipe thermistor or
connector fault.
12 Perform a check of the inverter PCB A6P. See
PCB" on page 99.
Possible cause: Faulty inverter PCB A6P.
13 Perform a check of the main PCB. See
page 106.
Possible cause: Faulty main PCB.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.14 E6-17-19-21 – Inverter overcurrent error
Main error code Sub error code
E6 17
19
21
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
Overcurrent on Unit will stop
Inverter PCB A3P for operating.
Compressor M1C.
Actual current value
of the compressor is
abnormally high
compared to nominal
current of the
compressor for at
least 30 minutes.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1 Perform a check of the refrigerant high pressure sensor. See
"3.15 Refrigerant high pressure sensor" on
Possible cause: Faulty refrigerant high pressure sensor.
2 Troubleshooting
"3.2 Compressor" on
"3.1 4-way valve" on
"3.8 Inverter
"3.9 Main PCB" on
Unit
Main
Sub 1
Sub 2
Reset
Manual reset via user
interface.
page 124.
Service manual
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