E5-00" - Compressor Motor Lock; E6-00" - Compressor Startup Defect - Daikin EDLQO5CAV3 Service Manual

ESIE15-08B | Part 2. Troubleshooting
Bad contact through pressure sensor
cable.
Faulty pressure sensor.
Abnormal drop of low pressure, caused by
inadequate refrigerant, abnormal refriger-
ant piping system or faulty electronic
expansion valve.
Faulty outdoor main PCB.
2.18. "E5-00" – Compressor motor lock
Trigger
The motor rotor does not rotate when the
compressor is energized.
Possible cause
Refrigerant circuit is clogged (HP - LP
> 0,26 MPa).
Faulty compressor.
Stop valve is closed.
Faulty inverter voltage output.
Compressor turned off too fast.
Faulty outdoor inverter PCB.
Faulty expansion valve.
Faulty 4-way valve.
2.19. "E6-00" – Compressor startup defect
Trigger
System detects that the current waveform
to the compressor has an abnormality, 16
times in 5 min.
19/07/16
Daikin Altherma Monobloc CA
Check if pressure sensor connector X17A
is properly connected to the outdoor PCB
board A1P.
Check the pressure sensor (see page 94).
Check for possible blockage. (blockages
can be checked by measuring the refriger-
ant/pipe temperature. Sudden drop in
temperature could indicate a blockage
(remark: this is not valid for the expansion
valve))
Check if the alive led is blinking in regular
intervals.
Check if the correct spare part is installed.
Check if the outdoor main PCB receives
power.
Effect
Unit will stop operating.
Check
Check for possible blockage (blockages
can be checked by measuring the refriger-
ant/pipe temperature. Sudden drop in
temperature could indicate a blockage
(remark: this is not valid for the expansion
valve)).
Check compressor (see page 91).
Check compressor connection and wiring.
Check expansion valve operation (liquid
back issue).
Check refrigerant charge (see page 106)
+ check for leaks.
Check if stop valve is open.
Check if inverter output voltages have
same amplitude.
Check outdoor inverter PCB (see
page 101).
Check if the alive led is blinking in regular
intervals.
Check if the correct spare part is installed.
Check expansion valve (see page 97).
Check 4-way valve (see page 99).
Effect
Unit will stop operating.
2. Error code based troubleshooting
Connect or replace sensor cable when
required.
Replace the pressure sensor when
required (see page 130).
Replace the blocked part.
Adjust the power to the outdoor main
PCB.
Replace outdoor main PCB when alive led
is not blinking in regular intervals (see
page 119).
Reset
Manual reset via user interface.
Corrective action
Replace the blocked part.
Replace the compressor when required.
(see page 125).
Investigate the reason of breakdown.
Replace expansion valve when required
(see page 131).
Fix the possible leak.
Open stop valve when required.
Replace outdoor inverter PCB when
required (see page 122).
Wait for guard timer to pass (3 min).
Adjust the power to the outdoor inverter
PCB.
Replace outdoor inverter PCB when
required (see page 122).
Replace expansion valve when required
(see page 131).
Replace 4-way valve when required (see
page 127).
Reset
Manual restart via user interface.
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