J7-00" - Malfunction Of Intermediate Heat Exchanger Thermistor; J8-00" - Malfunction Of Liquid Pipe Thermistor; Lc-00" - Transmission System Abnormality - Daikin EDLQO5CAV3 Service Manual

ESIE15-08B | Part 2. Troubleshooting
2.35. "J7-00" – Malfunction of intermediate heat exchanger thermistor
Trigger
Intermediate heat exchanger thermistor
detects an abnormal value (open or short
circuit).
Possible cause
Faulty intermediate heat exchanger ther-
mistor (R5T).
Faulty outdoor main PCB.
2.36. "J8-00" – Malfunction of liquid pipe thermistor
Trigger
Liquid pipe thermistor detects an abnor-
mal value (open or short circuit).
Possible cause
Faulty intermediate heat exchanger ther-
mistor (R6T).
Faulty outdoor main PCB.
2.37. "LC-00" – Transmission system abnormality
Trigger
No transmission between outdoor main
PCB and outdoor inverter PCB.
Possible cause
Internal wiring is not OK.
Faulty outdoor main PCB.
Faulty outdoor inverter PCB.
19/07/16
Daikin Altherma Monobloc CA
Effect
Unit stops operating.
Check
Check thermistor R5T (see page 88).
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 stops operating.
Check
Check thermistor R6T (see page 88).
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 stops operating.
Check
Check if wiring between PCB's is correct
(refer to wiring diagram).
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.
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.
2. Error code based troubleshooting
Reset
Auto-reset when problem is solved.
Corrective action
Replace thermistor R5T when required
(see page 124).
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 when problem is solved.
Corrective action
Replace thermistor R6T when required
(see page 124).
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 wiring.
Adjust the power to the outdoor main
PCB.
Replace outdoor main PCB when alive led
is not blinking in regular intervals (see
page 119).
Adjust the power to the outdoor inverter
PCB.
Replace outdoor inverter PCB when
required (see page 122).
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