Bard Q24A2DA, Руководство по установке

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Manual 2100-602A
Page 37 of 41
Sympton Possible Cause What to Check How to Check or Repair
Compressor contactor
does not energize
(cooling or heating)
Control circuit wiring
Check for R connection at unit,
and 24V between R-C.
Run R connection to outdoor units
Compressor lock out
1. Check for 24V between
L1-C on heat pump control.
2. Check across high pressure
switch.
1. If no voltage between L1-C turn ther-
mostat off and on again to reset high
pressure switch.
2. If high pressure switch is open and will
not reset, replace high pressure switch.
Compressor short cycle
protection
Check for 24V between CC-C
and Y-C on heat pump control.
If no voltage between CC-C jumper speed
up terminal and within 10 seconds power
should appear between CC-C. Remove
speed up jumper after 10 seconds.
Contactor defective
Check for open or shorted coil
winding.
Replace contactor.
Motor defective
Check for open or shorted motor
winding.
Replace motor.
Outdoor fan motor
does not run
(cooling or heating
except during defrost)
Motor capacitor defective Check capacitor rating. Check
for open or shorted capacitor.
Replace capacitor.
Inputs to Board Outputs From Board
G Y B W2 E1 A1 D RAT L G1 BK YO RV W E1 A2 TWV L
Cooling Mode Unoccupied X X X X X
Cooling Mode Occupied X X X X X X X
Cooling Mode w/Dehum. X X X X X X
Heating Mode Unoccupied X X X X
Heating Mode Occupied X X X X X X
Heating Mode w/Dehum. X X X X X
Dehumidification Unoccupied X X X X
Dehumidification Occupied X X X X X X
TROUBLESHOOTING
TABLE 5A
TROUBLESHOOTING
TABLE 5B
DEHUMIDIFICATION RELAY LOGIC BOARD