Gree GMVVQ1015WM/C-X, Service Manual

Page: 220 / 433

Gree GMV6 HR DC Inverter VRF Units Service Manual
218
■ The unit operates out of the range of required ambient temperature.
■ Airflow organization is set ineffectively.
■ The amount of refrigerant is insuffici
ent.
Troubleshooting:
Ineffective Coolin g a nd
Heating
Check aga in the amoun t of refrige rant to
be add ed in the pipe s and per form th e
ope rati ons from the check valve o f low
pressure gas pipe.
No
Whether th e check
valve o f th e o utdo or unit is
ope ned fu lly?
Yes
When touching by ha nd along
the flow direction of refriger ant, whether th e
pipe s have greatly varying temperatures
locally or g et frosty?
Yes
No
Ope n the check valve u ntil
it re ach es its maximu m, full
ope n p osition
No
Cut off the pipes for
confirmatio n a nd replace
and re-weld th e p ipes.
Whether th e i ndoor
and ou tdo or a mb ient temperature s
meet the requ irements of the unit?
In cooli ng mo de, check whether th e a mbi ent
temperature of the indo or u nit is h igher than
32°C. If it occurs within the first one hou r after
star tup, it is acceptabl e; otherwise, it in dica tes
that the model co nfig uration is unr easonable.
In cooli ng mo de, check whether th e o utd oor
ambien t te mp erature is high er tha n 40°C. If
yes, it is acceptabl e.
In h eating mo de, check whether th e a mbi ent
temperature of the indo or u nit is lo we r than
12°C. If it occurs within the first two hour s after
star tup, it is acceptabl e; otherwise, it in dica tes
that the model co nfig uration is unr easonable.
The right mod els should be selected.
In h eating mo de, check whether th e o utd oor
ambien t te mp erature is lower than -7°C. If ye s,
it is acceptabl e.
Yes
Whether the air outlet
and return of the outdoor unit are short
circuited, thus causing ineffective heat exchanging?
Whether the air return of the indoor unit is short
circuited, thus causing ineffective
heat exchanging?
Yes
Redesign airflow
orga nizatio n