DLQ-900-16 electric heater is a product provided by Changhong Technical Service Center. This product adopts a fan-shaped design and has remote control, oscillation, and power adjustment functions. The structure consists of a control circuit, column, and head. The head contains a heating component. The circuit structure adopts infrared remote control technology, which allows remote control operation within a range of 7 meters. The troubleshooting chapter describes the troubleshooting method for the power failure of the electric heater.
The DLQ-900-16 heater features a fan‑shaped design with a control circuit, a vertical column, and a head assembly that includes a halogen heating element, swing mechanism, and adjustable angles. It is operated via an infrared remote within a 7 m range or directly on‑panel buttons, offering two power levels (450 W and 900 W).
The manual provides detailed fault diagnosis and repair procedures for common issues such as no power, heating tube failure, low‑power mode problems, swing motor failure, and remote control loss. Step‑by‑step instructions include component testing, part replacement, and re‑assembly guidance for service technicians. This manual is written in Chinese.
| Low‑power output | 450 W |
|---|---|
| Input voltage (after rectification) | 12 V DC |
| Control circuit voltage | 5 V DC |
| Remote control range | 7 m |
| Heating element | Pear‑shaped halogen tube |
Press the “450W/900W” key; each press toggles the heater between the 450 W low‑power and 900 W high‑power settings.
Verify that the safety switch, thermal fuse, current fuse, and the receiving circuit board are receiving power; replace any faulty component.
Disassemble the cover, remove the halogen tube and its mounting hardware, install a new tube, reconnect the leads, and re‑assemble the unit in reverse order.
Check the infrared LED, crystal oscillator, battery, and receiver board for damage or loss of power; replace any defective parts and clean the board if necessary.