Daikin GQI-Eco Series, Руководство по обслуживанию

Страница: 203 / 215

ESIE15-13B Troubleshooting by Remote Controller
Service Diagnosis 189
Evaluation of Abnormal Low Pressure
Abnormally low pressure level is mostly caused by the evaporator side. The following contents are provided
based on field checking of service engineer. Further, the number is listed in the order of degree of influence.
In Cooling Operation
In Heating Operation
CHECK 3
Check items (Possible causes) Judgement
Does the outdoor unit fan run normally? Visual inspection
Is the indoor unit filter clogged? Visual inspection
Is there clogging before or after the EV (capillary)? Check if there is a temperature difference before and
after EV (capillary).
Check if the main valve unit of EV operates (by noise,
vibration).
Is the check valve clogged? Check if there is a temperature difference before and
after check valve.
 If YES, the check valve is caught.
Is the indoor unit installed under such conditions that
short circuit easily occurs?
Visual inspection
Is the refrigerant gas short? Conduct refrigerant collection and vacuum drying, and
then add proper amount refrigerant.
Check items (Possible causes) Judgement
Does the outdoor unit fan run normally? Visual inspection
Is the outdoor unit heat exchanger clogged? Visual inspection
Is the outdoor unit installed under such conditions that
short circuit easily occurs?
Visual inspection
Is there clogging before or after the EV (capillary)? Check if there is a temperature difference before and
after EV (capillary).
Check if the main valve unit of EV operates (by noise,
vibration).
Is the check valve clogged? Check if there is a temperature difference before and
after check valve.
 If YES, the check valve is caught.
Is the refrigerant gas short? Conduct refrigerant collection and vacuum drying, and
then add proper amount refrigerant.