FAST AIR NOT TRANSFERRING TO PRIMARY AIR WHEN IGNITIO N TURNED ON. PRIMARY AIR IN ALARM FOR MORE THAN 5 SECONDS AFTER IGNITION ON

TM 5-4210-220-12 Table 4-2 UNIT TROUBLESHOOTING - Continued MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 8n FAST AIR NOT TRANSFERRING TO PRIMARY AIR WHEN IGNITIO N TURNED ON. PRIMARY AIR IN ALARM FOR MORE THAN 5 SECONDS AFTER IGNITION ON Step 1 Check air starter valve on fast air tank Repair as required, (see para. 4-22) Step 2 Check for leaks on fast air reservoir Repair hoses/ connectors, replace tank or close drain valve Step 3 Solenoid valve operation on fast air tank Starter solenoid valve should be open when ignition on 8p ANY AIR RESERVOIR PRESSURE LOW Step 1 Check reservoir drain valve closed Close drain valve Step 2 Check for leaks from reservoir Repair hoses/connectors, replace tank Step 3 Check pressure protection valves for correct operation If one is not opening at set pressure of 85 psi (590 kPa), the tank it serves will not be charged. Replace, (see para. 4-22) Step 4 Check pressure gage or pressure switch Replace as required, (see para. 4-22) 9a ANY LIGHT FAILS TO OPERATE Step 1 Check bulb Replace bulb Step 2 Check bulb connector a Clean b Replace connector and bulb if severely corroded 4-41