Specifications include, but are not limited to: 3. TROUBLESHOOTING: 3.1 The Contractor shall troubleshoot the unit, and provide troubleshooting result documentation to Sun Tran upon request. Faulty parts identified during the troubleshooting process shall be repaired or replaced. The following parts list shall be the focus during the troubleshooting process: 3.1.1 Control Panel a. Main power switch b. Digital display board c. Key pad d. All indicator lights e. All Valve controls f. All gauge indicators 3.1.2 Unit Components a. Filter drier b. Vacuum pump c. Oil-less compressor d. Hermetic compressor e. Oil return manifold f. Refrigerant scale g. System oil drain valve h. Condenser coil i. Condenser fan j. All switches k. All relays l. Temperature scale m. Oil separator 4. REPAIRS: 4.1 Repairs shall be performed on an as-needed-basis. 4.2 All repair parts provided shall be genuine new Original Equipment Manufacturers (OEM) repair parts or OEM approved alternate parts as requested by Sun Tran. All OEM repair parts furnished shall be covered by the manufacturer's warranty and shall be supplied in the OEM's original packaging. Sun Tran will not accept used or refurbished repair parts. Non-OEM parts shall only be used with prior approval from Sun Tran. Sun Tran shall be the final authority on this requirement. 4.3 Estimates shall be prepared for repairs and shall require approval from management prior to work being done.