Table 5. Alert Codes and Troubleshooting | Critical alerts are displayed on Home (user) screen, in the Homeowner alert button, and in the Installer | |||
alert button. Minor and Moderate alerts are found only in the Installer alert button. | ||||
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Alert |
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Code | Priority | Alert Text | Steps to clear | |
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418 | Moderate | (Outdoor Unit) There is a faulty | Faulty W output circuit. | |
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| cuit. |
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419 | Critical | (Outdoor Unit) The | W output hardware fault count reached 5 strikes. | |
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| unit has reported more than 5 errors. As a re- |
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| sult, the system has shutdown the outdoor unit. |
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420 | Critical | (Air Handler) The heat pump defrost cycle has | Defrost cycle lasts longer than 20 minutes. Check heat pump operation. Cleared | |
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| taken more than 20 minutes to complete. | when W1 signal is removed. Applicable only in communicating mode with non−communicating heat | |
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| pump. | |
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421 | Critical | (Outdoor Unit) The | Voltage sensed on W output terminal when Y1 out is deactivated. | |
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| outdoor unit is not wired correctly. |
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700 | Moderate | (Stat) The temperature sensor in the thermostat | Recalibrate thermostat to clear. Replace thermostat if needed. | |
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| is not working properly. |
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701 | Moderate | (Stat) The thermostat is reading indoor tempera- | Recalibrate thermostat to clear; cool thermostat; adjust setpoint. Replace thermostat, if needed. | |
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| tures above the pre−programmed limit. |
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702 | Moderate | (Stat) The thermostat is reading indoor tempera- | Recalibrate thermostat to clear; warm thermostat; adjust setpoint. Replace thermostat, if needed. | |
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| tures below the pre−programmed limit. |
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703 | Moderate | (Stat) The humidity sensor in the thermostat is | Recalibrate thermostat to clear; adjust setpoint. Replace thermostat, if needed. | |
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| not working properly. |
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704 | Moderate | (Stat) The thermostat is reading indoor humidity | Recalibrate thermostat to clear. Replace thermostat, if needed. | |
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| levels above the pre−programmed limit. |
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705 | Moderate | (Stat) The thermostat is reading indoor humidity | Recalibrate thermostat to clear. Replace thermostat, if needed. | |
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| levels below the pre−programmed limit. |
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Ohm |
| The ohm reading in the system is either too | Ohm reading between i+ and i− anywhere on the RSBus with supply power off should be between 70 | |
| and 90 ohms. If above 90 ohms, check and repair wiring, splices or other wiring defects that may be | |||
Check |
| high or too low. | ||
| causing the excessive resistance. If less than 70 ohms, check for shorted wires. | |||
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Homeowner Service Alert Codes8
Number | Value | Number | Value | Number | Value | Number | Value | Number | Value |
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3000 | Filter 1 | 3002 | Humidifier Pad | 3004 | Maintenance | 4000 | User WiFi state change, disable | 4002 | Image file download failed |
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3001 | Filter 2 | 3003 | UV Light | 3005 | PureAir Maintenance | 4001 | Firmware download failed |
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506920−01 09/12 | Page 54 |
