Brand: Honeywell
Category: Security System
Document Type: Installation Guide
Language: EN
Available Languages: EN , ES
Installation Guide for DT7550UK2
Uploaded: Nov. 21, 2025, 6:55 p.m.
Warranty Information
Warranty information can be obtained from your local authorized Honeywell representative.
- Mounting: Select a location 2.3m high, avoiding direct sunlight, heating/cooling devices, and large moving objects. Ensure a clear line-of-sight. Mount the rear housing to a wall or corner, using the appropriate mounting holes.
- Wiring: Connect wires using 0.2-1.3 mm² wire. Observe polarity. Use EOL resistors if needed, configuring jumpers for fault, tamper, and alarm settings as per the table.
- Walk-test: Apply power. After initialization, adjust microwave range to minimum (25%). Walk through the detection area. The LED turns red upon alarm. Increase microwave range as necessary. Repeat for proper detection. The sensor must be walk-tested after every power-up.
- Optional Zone Finder: Use this mode to identify PIR and microwave patterns. The red LED is disabled. Green indicates PIR detection, yellow indicates microwave detection. Adjust range as needed. Zone finder times out after 10 minutes.
- Anti-Mask Function: The sensor performs a power-up mask detection test. It also operates in normal anti-mask mode, signaling a mask condition if materials block the view. Clearing the condition requires removing obstructions and potentially performing walk tests.
Troubleshooting and error codes
| TROUBLESHOOTING | NORMAL MASK | MASK FUNCTION | Low Voltage¹ | Fault² |
| Alarm Relay | Closed | Open | Closed | Closed |
| Fault Relay | Closed | Open | Open | Open |
| Red LED | Off | Off | Off | Flashing |
| *FAULT CONDITIONS: | ||||
| ¹Low Voltage: The sensor is disabled. | ||||
| ²Three possible conditions: | ||||
| Microwave Supervision failure: The sensor is operating in PIR mode only. | ||||
| PIR self-test failure: The sensor is disabled. | ||||
| Temperature Compensation failure: The temperature compensation is disabled. | ||||
| Depending on the Fault condition, take the following corrective actions: | ||||
| Verify the power supply is sufficient. | ||||
| Cycle power to the sensor. | ||||
| Walk test the sensor. | ||||
| Verify the sensor is not blocked or masked. | ||||
| If the Fault condition does not clear, replace the sensor. | ||||