What was found
WHEN CLOSING MAIN CABIN DOOR, AMBER DOOR OPEN LIGHT AND CAS REMAIN ILLUMINATED. POWER CYCLE WORKED TO CLEAR MALFUNCTION, BUT REOCCURED 2 LEGS LATER. PERFORMED MED OPS CHECK PER CE-700 AMM 52-10-00 MULTIPLE TIMES. PERFORMED MED WARNING SYSTEM OPS CHECK PER AMM 52-70-00. OPS CHECK GOOD AT THIS TIME. TECHS UNABLE TO RECREATE ORIGINAL FAULT MCC WILL CONTINUE TO MONITOR FOR FAULT AND ADVISED TECHS TO RELEASE AIRCRAFT BACK TO SERVICE.