As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE THE CREW REPORTED A NR 1 HYDRAULIC SYSTEM HIGH TEMP CAUTION MESSAGE. TWO SECONDS LATER O/B SPLRON, O/B FLT SPLRS, O/B GND SPLRS, & HYD 1 LOW PRESS CAUTION MESSAGES WERE RECEIVED. THE CREW ELECTED TO DIVERT FLIGHT 2219 TO DAY WHERE MAINTENANCE WAS AVAILABLE. MAINTENANCE REMOVED & REPLACED THE NR 1 ENGINE DRIVEN HYDRAULIC PUMP IAW CRJ200 AMM 29-11-01. FUNCTIONAL & LEAK TEST WAS GOOD. AIRCRAFT WAS RETURNED TO SERVICE.