Brand: Generic
Category: Home HVAC System
Document Type:
Language: EN
Manual for Single-Package Rooftop Unit (RTU) Gas Heating/Electric Cooling Units With R-410A Refrigerant - Troubleshooting and error codes + PDF Download
Uploaded: April 7, 2025, 8:14 p.m.
Manual Publish Date: 2014-10-01
Warranty Summary
No warranty information provided in this manual.
To Light Unit:
- Set thermostat to lowest temperature and SYSTEM to HEAT or AUTO.
- Turn off gas supply externally.
- Turn off electrical supply at RTU main disconnect.
- Remove gas component access panel.
- Move RTU gas valve to OFF and wait 5 minutes.
- Move RTU gas valve to ON.
- Replace gas component access panel.
- Restore electrical power.
- Turn on gas supply.
- Set thermostat above room temperature to start unit.
- Set thermostat heat setpoint to lowest and SYSTEM to OFF.
- Turn off gas supply externally.
- Turn off electrical supply at RTU main disconnect.
Troubleshooting and error codes
| Problem | Possible Solution | |
|---|---|---|
| Insufficient heating or cooling | Insufficient heating or cooling | Check air filter, return/supply grilles. |
| Unit not operating at all | Unit not operating at all | Check thermostat settings (temperature, SYSTEM switch). |
| Electrical supply off | Electrical supply off | Check electrical supply switch, fuses, circuit breaker. |
| Gas supply shut off (heating) | Gas supply shut off (heating) | Check external manual shutoff valve (open position). |
| Gas valve control switch off (heating) | Gas valve control switch off (heating) | Check gas valve control switch (ON position). |