Daikin Altherma EBLQ011CAV3, Руководство по обслуживанию

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1 Troubleshooting
Service manual
30
EBLQ+EDLQ011~W1 + EBLQ+EDLQ011~0W1
+ EK(2)CB EKMB9W1
Daikin Altherma – Monobloc
ESIE18-04 – 2019.02
Possible failure Root cause Check Repair
Air in the water circuit. NOT enough air purged. ▪ Check if all air purge valves are
open,
▪ Check if air purge valves are
installed on all highest points of
the field installed water circuit.
Purge air out of unit and field
supplied water system and backup
heater.
Water circuit (partially) blocked. Dirty water. Check water circuit (unit + field) for
blockages. Remove possible blockages and
check the water quality.
Root cause category: component – mechanical
Possible failure Root cause Check Repair
Refrigerant shortage. ▪ Refrigerant leakage,
▪ Incorrectly charged.
▪ Check refrigerant charge,
▪ Pressure test the system to
check for leakage.
If required, repair the leak and
charge the correct refrigerant
amount.
Air Purge blocked - air trapped in
water system. Component failure. Check air purge valve. Replace air purge valve.
Root cause category: component – electrical
Possible failure Root cause Check Repair
Refrigerant pressure sensor -
higher pressure measured than
actual. Deviation of refrigerant pressure
sensor (higher value measured
than actual). Check refrigerant pressure sensor. Replace refrigerant pressure
sensor.
Discharge pipe thermistor – higher
temperature measured than actual. Deviation of thermistor (higher
temperature measured than
actual). Check discharge pipe thermistor. Replace discharge pipe thermistor
or replace PCB.
Expansion valve incorrect control -
superheat too high. ▪ Faulty suction thermistor,
▪ Faulty expansion valve control.
▪ Check suction thermistor,
▪ Check the expansion valve.
Replace suction thermistor or
replace expansion valve.
Backup heater NOT working. Component failure. Check backup heater. Replace backup heater.
Deviation of outlet water after
backup heater thermistor will
influence the backup heater
control. ▪ Deviation of thermistor (higher
temperature measured than
actual),
▪ Bad contact between sensor
and pipe.
Check outlet water after backup
heater thermistor. Replace outlet water after backup
heater thermistor or PCB A1P.
Flow sensor deviation – flow
measured higher than actual. Component failure. Check the flow sensor. Replace the flow sensor.
3‑way valve blocked. Component failure. Check the 3‑way valve. Replace the 3‑way valve.
1.5.11 Space heating capacity shortage
Root cause category: end user
Possible failure Root cause Check Repair
Too low leaving water temperature
setpoint. User set too low leaving water
temperature setpoint by schedule
or manual operation. Check leaving water setpoint. Adapt leaving water setpoint.
(Remark: check the weather
dependent settings (relation
outdoor temperature - setpoint) in
case weather dependent control is
activated.)
Too low space heating setpoint on
room thermostat. User set too low room setpoint by
schedule or manual operation. Check room thermostat setpoint. Adapt room thermostat setpoint.
(Remark: check the weather
dependent settings (relation
outdoor temperature - setpoint) in
case weather dependent control is
activated.)
Space heating NOT activated. Check if space heating is
activated.
Root cause category: parameter (setting)
Possible failure Root cause Check Repair
External room thermostat used
with setting [C‑07] on value 2 (=
RT control). Wrong setting of [C‑07] - unit
control method. Check setting [C‑07]. Adjust setting to match application
- see installer reference guide.