Smart (50Hz) - domnick hunter
Smart (50Hz) - domnick hunter
Smart (50Hz) - domnick hunter
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7 Troubleshooting Z<br />
no<br />
Compressor<br />
noisy<br />
Compressor<br />
components<br />
deteriorated<br />
English<br />
yes<br />
Repair or<br />
replace<br />
compressor<br />
Z<br />
yes<br />
CP<br />
compressor<br />
thermal protection<br />
alarm<br />
Condenser<br />
dirty or<br />
obstructed<br />
no<br />
Compressor<br />
winding<br />
with partial<br />
loss of<br />
insulation<br />
no<br />
yes<br />
Clean<br />
condenser<br />
Lt Low evaporation temperature alarm<br />
Ld Low dew point alarm.<br />
Low<br />
cooling<br />
air<br />
temperature<br />
no<br />
Fan<br />
always<br />
working<br />
(PV pressure<br />
switch fault)<br />
no<br />
Hot gas<br />
valve<br />
not calibrated<br />
no<br />
FAULT CAUSE REMEDY<br />
yes<br />
yes<br />
yes<br />
yes<br />
Replace<br />
the coil<br />
Z<br />
Increase<br />
cooling air<br />
temperature<br />
Replace<br />
pressure switch<br />
Z<br />
Calibrate<br />
valve<br />
Z<br />
Liquid line<br />
solenoid valve<br />
closed<br />
no<br />
LP Low<br />
pressure<br />
alarm<br />
LP<br />
Low pressure<br />
switch fault<br />
no<br />
yes<br />
no<br />
Fan<br />
pressure switch<br />
(PV) not set<br />
no<br />
Low<br />
current<br />
absorption<br />
no<br />
High<br />
dew point<br />
warning<br />
Excessive thermal load<br />
(air flow, inlet temperature)<br />
yes<br />
yes<br />
Request external assistance<br />
Replace<br />
pressure<br />
switch<br />
Z<br />
Replace<br />
pressure switch<br />
Z<br />
No<br />
refrigerant.<br />
Recharge<br />
Z<br />
yes<br />
Ht<br />
High<br />
temperature<br />
alarm<br />
Cooling<br />
air<br />
high<br />
temperature<br />
no<br />
no<br />
Condenser<br />
dirty or<br />
obstructed<br />
no<br />
Low<br />
current<br />
absorption<br />
no<br />
yes<br />
yes<br />
yes<br />
Decrease<br />
cooling air<br />
temperature<br />
Decrease<br />
compressed<br />
air quantity<br />
temperature<br />
Clean<br />
condenser<br />
Replace<br />
pressure switch<br />
Z<br />
Replace fan<br />
Z<br />
yes<br />
yes<br />
yes<br />
yes<br />
yes<br />
HP<br />
high pressure<br />
alarm<br />
Cooling<br />
air<br />
high<br />
temperature<br />
no<br />
Excessive<br />
thermal load<br />
(inlet air flow,<br />
temperature)<br />
no<br />
Condenser<br />
dirty or<br />
obstructed<br />
Fan<br />
does not turn<br />
(PV pressure<br />
switch fault)<br />
Fan<br />
fault<br />
no<br />
no<br />
no<br />
PST120---350<br />
35
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