Daikin EWYQ230DAYN Сервис мануал онлайн [407/524] 403923

Daikin EWYQ230DAYN Сервис мануал онлайн [407/524] 403923
ESIE06-05 Overview of Fault Indications and Safeties
Part 3 – Troubleshooting 3–7
33
4
5
1
OAE : PUMPINTERLOCK
Purpose:
Detect if pump works or not.
OA4: FREEZE UP
Purpose:
To prevent freezing of the evaporator.
OA9: EEV PCB COMM ERR
OA9: EEV PCB ERR
Purpose:
Indicate if there is no communication with the EEV-PCB.
Symptom: Pump interlock contact is open
POSSIBLE CAUSES CORRECTIVE ACTION CONSEQUENCE
The pump interlock contact is
not closed.
Make sure a pump interlock
contract is wired correctly and
closed when the pump starts
operating.
Unit switched off
RESET : Only if a pump contractor is present: Switch the black handle on the pump fuse inside the
switchbox and reset the controller.
Symptom: Freeze-up protection is activated
POSSIBLE CAUSES CORRECTIVE ACTION CONSEQUENCE
Water flow too low. Increase the water flow. In case outlet water tempera-
ture becomes too low. Soft-
ware version 2.2 or higher.
Freeze-up disable, unit will
switch off, no safety, unit will
restart if water temperature is
above reset setpoint and com-
pressor timers are on 0.
After second (default) freeze
up disable within 30 min alarm
is displayed and manual reset
of the controller is needed.
Inlet temperature to the evap-
orator is too low.
Increase the inlet water tem-
perature.
Flow switch is not working or
no water flow.
Check the flow switch and the
water pump.
RESET : After water temperature rises, above the RESET value, this safety resets automatically,
but the controller still needs to be reset.
Refrigerant temperature
becomes too low (=def -3.5
°C)
Check the water flow and fil-
ter.... (No good heat exchange
in the evaporator).
Unit switched off.
RESET: After refrigerant temperature rise, above -3.5 °C, this safety resets automatically, but the
controller still needs to be reset.

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