L8-00" - Electronic Thermal Overload; Pj-00" - Defective Capacity Setting; Ua-00" - Indoor-Outdoor Pcb Combination - Daikin EDLQO5CAV3 Service Manual

ESIE15-08B | Part 2. Troubleshooting
2.42. "L8-00" – Electronic thermal overload
Trigger
When compressor overload (except dur-
ing startup) is detected.
Possible cause
Refrigerant circuit is clogged.
Refrigerant overcharge.
Faulty compressor.
Faulty outdoor inverter PCB.
2.43. "PJ-00" – Defective capacity setting
Trigger
Outdoor main PCB detects a defective
capacity in EEPROM.
Possible cause
Positions of PCB dip switches are not OK.
Faulty outdoor main PCB.
2.44. "UA-00" – Indoor-Outdoor PCB combination
Trigger
System detects combination mismatch
between outdoor main PCB and hydro
PCB or outdoor inverter PCB.
Possible cause
Wrong unit combination.
Wrong field setting for compressor type.
Page 38
Daikin Altherma Monobloc CA
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 for refrigerant overcharge.
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 outdoor inverter PCB (see
page 101).
Check if the alive led is blinking in regular
intervals.
Check if the correct spare part is installed.
Effect
Unit will stop operating.
Check
Check if dip switches are set to default
(OFF) position.
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 combination database.
Check setting [E-01].
2. Error code based troubleshooting
Reset
Manual reset via user interface.
Corrective action
Replace the blocked part.
Charge the system with correct refrigerant
charge.
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.
Adjust the power to the outdoor inverter
PCB.
Replace outdoor inverter PCB when
required (see page 122).
Reset
Manual reset via user interface.
Corrective action
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
Auto-reset.
Corrective action
Correct installation.
Check setting [E-01] to correct value.
19/07/16