Trouble | Probable Cause |
COMMPRESSOR OPERATES | E. Inoperative or disconnected |
CONTINUOUSLS BUT DOES | |
NOT FORM SUFFICIENT ICE | valve (see applicable |
BANK (CONT’D) | REFRIGERATION FLOW |
| DIAGRAM). |
F. Inoperative control board. No output from board to solenoids.
Remedy
E.Check that expansion valve is operating by touch (should be able to feel valve pulse).Check for loose or disconnected wire to solenoid coil. If necessary, troubleshoot expansion valve with a gage set to see if it is opening. If expansion valve is not opening, suction pressure will be in a vacuum.
F.Check LED’s on control board to see if they are modulating. Check for 24V output to pulse modulating expansion valve (see WIRING DIAGRAM). If control board green LED is on and yellow LED Is flashing; but no 24V output, replace board.
NOTE: If overload protector cuts out compressor, condenser fan motor will continue to operate otherwise; troubleshooting condenser fan motor problem is same as for ‘‘COMPRESSOR DOES NOT OPERATE’’paragraph plus the following:
CONDENSER FAN MOTOR | Standard Cooling Unit with |
NOT OPERATING. | Condenser Coil and Fan |
| Assembly |
| A. Jumper cord loose or |
disconnected from condenser fan motor or terminals inside control box. Broken wire in cord.
A.Tighten connections or replace cord.
| B. | Fan blade obstructed. | B. | Remove obstruction. |
| C. | Inoperative condenser fan | C. | Replace condenser fan motor. |
|
| motor. |
|
|
| Remote Condenser Coil and Fan |
|
| |
| assembly. |
|
| |
| A. Blown power circuit fuse. | A. Replace power circuit fuse. | ||
| B. | Fan blade obstructed. | B. | Remove obstruction. |
| C. | Inoperative condenser fan | C. | Replace condenser fan motor. |
|
| motor. |
|
|
| D. | Cooling unit contactor | D. | Replace Cooling Unit contactor. |
|
| inoperable. |
|
|
|
|
|
|
|
AGITATOR MOTOR NOT | A. | Agitator motor propeller | A. | Remove obstruction. |
OPERATING. |
| obstructed. |
|
|
| B. | Low voltage. | B. Voltage must be at least 208 volts | |
|
|
|
| at compressor terminals when |
|
|
|
| compressor is trying to start |
| C. | Loose, disconnected, or | C. Tighten connections or replace | |
|
| broken wiring. |
| broken wiring. |
| D. | Inoperative agitator motor. | D. | Replace agitator motor. |
300381000 | 44 |
