Purpose: To check for internal leaks through the discharge valve plates and the pilot solenoid and to perform service work on the compressor. Compressor Pump…
Purpose: To use a process of elimination to identify an internal leak. 1. Eliminate the bypass check valve. Perform a low side pump down with…
After performing steps #1-6 above, the following service can be performed with the low side pumped down and a slight positive pressure established. 1. Add…
Purpose: To test for internal high to low side leaks and to perform service on the low side without refrigerant loss. Low Side Pump Down…
Purpose: To check or adjust the suction pressure regulator setting. Test & Adjustment Procedure 1. Obtain the recommended setting from current Service Bulletins or the…
Purpose: To properly adjust throttling valves. Adjustment Procedure 1. Pump down the compressor or the low side and adjust compressor crankcase pressures to approximately one…
Purpose: To accurately check the pressure setting of mechanical throttling valves. Test Procedure 1. Obtain the recommended setting from current Service Bulletins or the unit…
Purpose: This field test determines whether a unit is performing up to standards. To complete the test, prepare the unit, measure the temperature difference of…
NOTE: The unit should be kept off when performing these procedures. 1. Install a calibrated gauge manifold. 2. Recover the refrigerant and evacuate the system.…
Purpose: To check a unit suspected to be overcharged. 1. Install a calibrated gauge manifold. 2. Operate the unit in high speed cool five minutes…