Brand: Honeywell
Category: Other
Document Type: Manual
Language: EN
Available Languages: EN , ES
Manual for PLS550A/PLS551A
Uploaded: Nov. 21, 2025, 6:28 p.m.
Warranty Information
Honeywell warrants this product against defects in workmanship and materials for three years from the date of purchase.
The Honeywell PLS550A/PLS551A is a 7-day solar programmable wall switch designed for single-switch or 3-way installations. It controls incandescent, halogen, low-voltage halogen, and fluorescent lighting, with load requirements between 40W and 500W. The switch offers Manual, Automatic, and Random modes for light control. In Automatic mode, users can set custom on/off schedules based on time or sunrise/sunset. Temporary overrides are possible. The device features a backlight, automatic daylight saving time adjustment, and latitude/longitude settings for accurate solar timing. It includes a safety switch for bulb replacement and troubleshooting tips for common issues.
Troubleshooting and error codes
| Problem | Possible Cause | Solution |
|---|---|---|
| Screen is blank. | A light bulb is burned out. The safety switch is pulled out (see section 4). |
|
| The display is faded or irregular. | The load is less than 40 W. The ambient temperature is either below or above the switch's operating temperature. |
|
| The metal plate is hot. | This is normal with high loads (maximum of 500 W). | |
| The sunset or sunrise time is inaccurate. | The date or time is wrong (see section 5.2). The longitude or latitude is wrong (see section 5.3.3). The correction factor is wrong (see section 5.3.4). You have entered an offset (see section 5.4.3). |