E5-01-02-03 - Compressor Overload Error - Daikin VRV IV+ Service Manual

2 Troubleshooting
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
Low pressure control Unit will stop
(by sensor) active operating.
due to <safety 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 cross‑wiring check of the F1‑F2 transmission wiring
between the indoor units and outdoor unit. 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
settings" on page 188. If any other indoor unit (that should be
connected to a different outdoor unit) is operating, this indoor
unit is connected to the wrong outdoor unit (cross‑wired).
Correct the wiring between the indoor unit(s) and outdoor unit.
Possible cause: F1‑F2 transmission wiring is cross‑wired
with another outdoor unit system.
3 Check if the refrigerant circuit is correctly charged. See
"4.2 Refrigerant circuit" on page 133.
Possible cause: Refrigerant shortage.
4 Check for the presence of humidity in the refrigerant circuit. See
"4.2 Refrigerant circuit" on page 133.
Possible cause: Humidity in the refrigerant circuit.
5 Check if the refrigerant circuit is clogged. See
circuit" on page 133.
Possible cause: Clogged refrigerant circuit.
6 Perform a check of the evaporator side expansion valve. See
"3.5 Expansion valve" on page 89.
Possible cause: Faulty evaporator side expansion valve.
7 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.
8 Clean the outdoor heat exchanger. See
page 140.
Possible cause: Dirty outdoor heat exchanger.
9 Perform a check of the refrigerant low pressure sensor. See
"3.16 Refrigerant low pressure sensor" on page 126
Possible cause: Faulty refrigerant low pressure sensor.
10 Perform a check of the main PCB. See
page 106.
Possible cause: Faulty main PCB.
Service manual
16
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Reset
Manual reset via user
interface.
Automatic Reset
when Low Pressure
>reset value, see
"6.6 Safety
devices" on
page 183.
page 133.
"6.9 Field
"4.2 Refrigerant
page 138.
"5 Maintenance" on
"3.9 Main PCB" on
11 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.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.12 E5-01-02-03 – Compressor overload error
Main error code Sub error code
E5 01
02
03
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 M1C. 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.
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.
page 130.
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
"3.2 Compressor" on
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ Heat Pump
ESIE18-14 – 2019.07