WARNING: New pump-down service techniques are required when working on scroll compressors. • When pumping down scroll compressors always operate the unit in low speed.…

Purpose: To check for a leak through the TherMax solenoid in the cool mode. Leak Test Procedure 1. Install a calibrated gauge manifold. 2. Confirm…

Purpose: To test the TherMax solenoid for opening. TherMax Solenoid Opening Test Procedure 1. Install a calibrated gauge manifold. 2. Remove the #26 wire from…

Purpose: To check for a leak through the receiver outlet check valve. 1. Install a calibrated gauge manifold. 2. Install an additional compound gauge on…

Purpose: To test for internal high to low side leaks and to perform low side service without refrigerant loss. Low Side Pump Down Procedure 1.…

The Thermax system allows the complete unit charge to be available during heat. Truck units with TherMax have had some components of the standard 3-way…

Purpose: To test the heat exchanger for an internal high side to low side leak. NOTE: To prevent refrigerant loss to the atmosphere, recovery equipment…

Purpose: This check confirms the expansion valve setting and operation and enables the technician to make adjustments if required. NOTE: Perform low side pumpdown, compressor…

1. Momentarily energize the pilot solenoid to shift the 3 way valve. NOTE: On late 1989 and newer units the pilot solenoid must remain energized…

1. Front seat the condenser pressure bypass check valve. 2. Operate the unit in high speed cool and cover the condenser coil to build discharge…