7H-05" - Water Flow Abnormality During Space Heating Operation; 7H-06" - Water Flow Abnormality During Defrost/Cooling Operation; 8F-00" - Backup Heater Outlet Water Temperature Error During Domestic Hot Water Operation; 05" - Water Flow Abnormality During Space Heating Operation - Daikin EDLQO5CAV3 Service Manual

ESIE15-08B | Part 2. Troubleshooting
Possible cause
See possible cause for 7H-01.
Focus error handling on DHW circuit.
2.57. "7H-05" – Water flow abnormality during space heating operation
Trigger
Water flow abnormality detected mainly
during space heating operation.
Possible cause
See possible cause for 7H-01.
Focus error handling on DHW circuit.
2.58. "7H-06" – Water flow abnormality during defrost/cooling operation
Trigger
Water flow abnormality detected mainly
during defrost/cooling operation.
Possible cause
See possible cause for 7H-01.
Focus error handling on cooling circuit.
2.59. "8F-00" – Backup heater outlet water temperature error during domestic hot
water operation
Trigger
Outlet backup heater thermistor detects
temperature above 75°C during domestic
hot water operation.
Possible cause
Increased water temp by external heat
source.
Faulty outlet backup heater thermistor.
Faulty backup heater contactors (stick-
ing).
Faulty hydro PCB A1P.
19/07/16
Daikin Altherma Monobloc CA
Check
-
Effect
Unit will stop operating, after some time it
will automatically try to start operating
again.
Check
-
Effect
Unit will stop operating, after some time it
will automatically try to start operating
again.
Check
-
Effect
Unit will stop operating.
Check
Check if another heat source is installed
on the same water circuit.
Check outlet backup heater thermistor
(see page 70).
Check backup heater control contactors
(see page 66).
Check if the alive led is blinking in regular
intervals.
Check if the correct spare part is installed.
Check if hydro PCB A1P receives power.
2. Error code based troubleshooting
Corrective action
-
Reset
Manual reset via user interface.
Corrective action
-
Reset
Manual reset via user interface.
Corrective action
-
Reset
Manual reset via user interface.
Corrective action
Correct hydraulic field circuit. Refer to the
Installer Reference Guide.
Replace outlet backup heater thermistor
when required.
Replace the contactor(s) when required.
Adjust the power to the PCB.
Replace hydro PCB A1P when alive led is
not blinking in regular intervals.
Adjust software of hydro PCB A1P or
install correct spare part when required.
Page 45