Ah-00" - Disinfection Operation Error; Aj-03" - Domestic Hot Water Heat Duration Is Too Long (Warning) - Daikin EDLQO5CAV3 Service Manual

ESIE15-08B | Part 2. Troubleshooting
2.3. "AH-00" – Disinfection operation error
Trigger
Disinfection setpoint is not reached or not
kept at required temperature long enough.
Possible cause
Large hot water quantity has been tapped
during / before disinfection.
Backup heater is restricted during disin-
fection.
Faulty water tank thermistor R5T.
Tank setting not OK.
Backup heater not allowed.
Faulty hydro PCB A1P.
Faulty extension PCB A4P.
Booster heater not allowed.
2.4. "AJ-03" – Domestic hot water heat duration is too long (warning)
Trigger
DHW heat-up > 6 hours.
Possible cause
Faulty backup heater.
Faulty or disturbance of the power supply.
(Imbalance > 10%) Power drop.
Short circuit.
Blown fuse.
Too large DHW consumption.
Faulty 3-way valve.
Leaking field installed DHW tap.
Backup heater not allowed.
Mismatch between software ID and EEP-
ROM on the hydro PCB A1P or User
Interface
Faulty booster heater.
Booster heater not allowed.
19/07/16
Daikin Altherma Monobloc CA
Effect
Unit will continue operating.
Check
Check when the disinfection is scheduled
(schedule it when there is little chance
that water will be tapped so that the disin-
fection can finish in time).
Check the backup heater settings [4-00]
till [4-04]. Refer to the Installer Reference
Guide.
Check thermistor R5T (see page 70).
Check settings regarding tank.
Check setting backup heater (e.g. [4-00]).
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.
Check PCB A4P (see page 86).
Check if the correct spare part is installed.
Check all electrical heater related settings
(e.g.[4-00])
Effect
Unit switches to space heating for 3
hours.
Check
Check backup heater (see page 65).
Check if the power supply is conform with
regulations. No fluctuations in frequency.
Check fuses on PCB's.
Check 3-way valve (see page 84).
Check installation. Refer to Installer Ref-
erence Guide.
Check setting backup heater (e.g. [4-00]).
Confirm if the software and EEPROM on
hydro PCB A1P [Menu structure 6.8.2]
and User Interface [Menu structure 6.8.1]
correspond with the detailed information
given in the Update work instruction.
Check booster heater (see page 69).
Check all electrical heater related settings
(e.g.[4-00])
2. Error code based troubleshooting
Reset
Auto-reset when next disinfection is com-
pleted.
Corrective action
Adjust schedule timer and/or related set-
tings. Refer to the Installer Reference
Guide.
Adjust related settings. Refer to the
Installer Reference Guide.
Replace thermistor R5T when required
(see page 124).
Change settings.
Change settings.
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.
Replace extension PCB A4P when
required.
Change settings when required.
Reset
Automatic reset via user interface.
Corrective action
Replace backup heater when required.
Adjust power supply when required.
Power reset via outdoor unit.
Replace fuses when required.
Lower DHW consumption.
Replace 3-way valve when required.
Fix the leak.
Change settings of backup heater.
Update hydro PCB A1P and User Inter-
face again, do not forget to select "Reset
to factory settings" at the beginning of the
update procedure.
Replace the booster heater when required
(see Installer reference guide of the water
tank).
Change settings when required.
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