Commercial Fixed Wing
Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument
Situational Awareness; Troubleshooting
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural FAR
Air Traffic Control Provided Assistance; Flight Crew Became Reoriented; Flight Crew Diverted; Flight Crew Requested ATC Assistance / Clarification; Flight Crew Overcame Equipment Problem; General Maintenance Action; General Flight Cancelled / Delayed
Weather; Aircraft; Human Factors
On a flight from ZZZ to ZZZ1 while in icing conditions we received an HSDI FAIL CAS message. We started reviewing the QRH for HSDI FAIL when the HSDI FAIL ON appeared and the HSDI FAIL went out. We ran the HSDI FAIL ON QRH procedure twice with no results. We had exited icing at that point so we continued to ZZZ1. The HSDI FAIL ON CAS stayed on until shutdown in ZZZ1. We powered the plane up in ZZZ1 via a GPU and then started the right engine; we did not receive any HSDI CAS messages; we did cycle the HDSI system on and off and the valve seems to work normally on the ground. We departed ZZZ1 to ZZZ2 and climbing out we entered icing conditions; the IPS (Ice Penetration System) turned on automatically. We received both an HSDI FAIL and a HSDI FAIL ON CAS while in icing conditions. We exited icing conditions and diverted to ZZZ3; the HSDI FAIL ON CAS stayed on until shutdown in ZZZ3.
Captain reported diverting due to HSDI FAIL message caused by inflight icing.