>a__WcU[S^ <[c >a`V[e[a`Wc
no
no
7. High pressure overhigh protection: 13 flashes of outdoor alarm lamp.
When high pressure switch is activated: Pressure is above 3.0 MPa.
Are connectors of CN16 pressure switch
in good condition?
yes
yes
Check and reconnect
Is high pressure switch activated?
Firstly, check if high pressure switch circuit
has a problem, such as short-circuit,
damaged component. Replace mainboard
when necessary
no
Is pressure value detected by
pressure gage above 3MPa?
no
Replace high side 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
-168-
Summary of Contents for H-MRV AF092FCBHA
Page 121: ... _ VbTZR Zb _ UZdZ_ Vb AU242FHBHA PCB top layer printed diagram 121 ...
Page 122: ... _ VbTZR Zb _ UZdZ_ Vb AU242FHBHA PCB bottom layer printed diagram 122 ...
Page 127: ... _ VbTZR Zb _ UZdZ_ Vb AU482FIBHA high voltage PCB printed diagram 127 ...
Page 131: ... _ VbTZR Zb _ UZdZ_ Vb AU482FIBHA low voltage PCB printed diagram 131 ...
Page 152: ... a__WcU S c a V e a Wc AB092 182FCBHA PCB printed diagram 152 ...
Page 156: ... a__WcU S c a V e a Wc AE FCBKA PCB printed diagram 156 ...
Page 199: ...MEMO Commercial Air Conditioner ...