GRUPAd.o.o.
replace PCB
no
no
switch
in good condition?
yes
yes
Check and reconnect
Is high pressure switch activated?
no
Is pressure value detected by
no
Replace high pressure switch
yes
yes
Are stop valves in suction
pipe and liquid pipe of
outdoor unit open?
no
Is piping twisted or deformed?
Open stop valve
yes Repair or
replacement
no
if outdoor fan motor work properly during cooling
cycle? and if indoor fan motor and indoor EEV
work properly during heating cycle?
Check fan motor
or indoor EEV
yes
Is filter or heat exchanger dirty?
no
yes
cleaning
Is system overfed? Is there air in system?
Is reading of discharging pipe pressure
g
au
ge oscillatory?
yes
Evacuate and recharge
6. High pressure overhigh protection
Are connectors of pressure
pressure gauge above 3MPa?
66
MB FRIGO Grupa d.o.o., Bani 81, 10010 Zagreb, tel: 01/66 08 002, fax: 01/66 08 005, www.mbfrigo.hr, e-mail: [email protected]