⚠
warning Honeywell
Error Code CHECK
A malfunction has been discovered in the system, an open is detected in a fire zone, or a fault in a DAY/NIGHT burglary zone during a disarmed period.
? What Causes This
System malfunction, open fire zone, or faulted DAY/NIGHT burglary zone.
✓ How to Fix It
Press the READY key to display faulted zones. Secure or bypass the faulted zones. If the problem persists, contact your installer or service provider.
Source: page 10 of the official manual
From the manual
This error code appears in:
Honeywell Vista-20P Security System