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Bard QW5S1 Manual De Usuario

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Página de 46
Manual 2100-532B
Page
44 of 46
Heat
Gen.
Power Failure
Blown Fuse or Tripped Breaker
Faulty Wiring
Loose Terminals
Low Voltage
Defective Contacts in Contactor
Compressor Overload
Potential Relay
Run Capacitor
Start Capacitor
Faulty Wiring
Loose Terminals
Control Transformer
Low Voltage
Thermostat
Contactor Coil
Pressure Controls (High or Low)
Indoor Blower Relay
Discharge Line Hitting Inside of Shell
Bearings Defective
Seized
Valve Defective
Motor Wingings Defective
Refrigerant Charge Low
Refrigerant Overcharge
High Head Pressure
Low Head Pressure
High Suction Pressure
Low Suction Pressure
Non-Condensables
Unequalized Pressures
Solenoid Valve Stuck Closed (Htg)
Solenoid Valve Stuck Closed (Clg)
Solenoid Valve Stuck Open (Htg or Clg)
Leaking
Defective Valve or Coil
Plugged or Restricted Metering Device (Htg)
Scaled or Plugged Coil (Htg)
Scaled or Plugged Coil (CLg)
Water Volume Low (Htg)
Water Volume Low (Clg)
Low Water Temperature (Htg)
Plugged or Restricted Metering Device (Clg)
Fins Dirty or Plugged
Motor Winding Defective
Air Volume Low
Air Filters Dirty
Undersized or Restricted Ductwork
Auxillary Heat Upstream of Coil 
Compressor 
W
ill Not Run    
       
     
No Pow
er at Contact
or
Compressor 
W
ill Not Run    
       
Pow
er at Contactor
Compressor 
"Hums
"   
       
       
       
But W
ill Not 
Start
Compressor 
Cyc
les on Ov
erload
Thermost
at Check
 Light
       
       
    
Lite-Lock
out Relay
Compressor 
Off on High  
       
    
Pressure Control
Compressor 
Off on Low
    
       
Pressure Control
Compressor Noisy
Head Pressure T
oo High
Head Pressure T
oo Low
Suction P
ressure Too High
Suction P
ressure Too Low
I.D. Blow
er W
ill Not
 Start
I.D. Coil 
Frosting or Ic
ing
High Compress
or Amps
Ex
cessiv
e W
ater Us
age
Compressor 
Runs Continuously
  
    
–  No Cooling
Liquid Refrigerant Fl
ooding Back
  
To Compres
sor
Compressor 
Runs Continuously
  
    
–  No Heating
Rev
ersing Valv
e Does
 Not Shift
Liquid Refrigerant Fl
ooding Back
  
To Compres
sor
Aux
. Heat on I.
D. Blow
er Off
Ex
cessiv
e Operati
on Costs
Ice in W
ater 
C
oi
l
            Heating Cycle
AU
X
.
Cooling 
Cycle
                                             Heating or Cooling Cycles
In
d
oor 
Bl
ower 
M
otor 
and  Coi
l
INDOOR SECT
ION
POW
ER SUP
PLY
W
ater 
S
olenoid
R
ev
. 
Valv
e
W
ater Coi
l
W
A
T
E
R COIL SE
CT
IO
N 
Line V
oltage
Control Ci
rcuit
Compressor
Refri
gerant Sy
stem
QUICK REFERENCE TROUBLESHOOTING CHART FOR WATER TO AIR HEAT PUMP
 
DENOTES COMMON CAUSE
DENOTES OCCASIONAL CAUSE