ENVISION RESIDENTIAL INSTALLATION MANUAL
Microprocessor Control (cont.)
Compressor Monitoring/Comfort Alert
The comfort Alert displays abnormal compressor conditions through a unique flash code and communicates the conditions to the heat pump microprocessor control. The heat pump microprocessor will determine which fault to act on and ignore. Fault codes 2 (sys- tem pressure), 4 (locked rotor), 6 (open start circuit), and 7 (open run circuit) will result in a lockout. All other fault codes are passive. All compressor alerts are displayed on the module by flashing the yellow Alert LED a specific number of times consecutively followed by a pause, and then repeated. The number of consecutive flashes or “Flash Code” correlates to a specific abnormal condition. The red “TRIP” LED means there is a thermostat demand signal “Y” present but the compressor is not running. The green “POWER” LED means the module has power.
Green "POWER" LED - module has power
Red "TRIP" LED - Thermostat "Y" demand signal is present, but the compressor is not running.
Comfort Alert Flash Codes
Yellow "ALERT" LED | LED Description | Cause | |
Flash Code 1 | Long Run Time | Eighteen consecutive hours of compressor run time |
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Flash Code 2 | System Pressure Trip | Not applicable |
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Flash Code 3 | Short Cycling | Compressor run time of less than 3 minutes on 4 consecutive cycles |
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Flash Code 4 | Locked Rotor | Four consecutive compressor protector trips indicating compressor won't start |
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Flash Code 5 | Open Circuit | "Y" thermostat demand signal with no compressor current |
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Flash Code 6 | Open Start Circuit | "Y" thermostat demand signal with no current in the start circuit |
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Flash Code 7 | Open Run Circuit | "Y" thermostat demand signal with no current in the run circuit |
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Flash Code 8 | Welded Contactor | Current detected with no "Y" thermostat demand signal present |
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Flash Code 9 | Low Voltage | Less than 17 VAC detected in control circuit | |
*Flash code number corresponds to a number of LED flashes, followed by a pause and then repeated.
*TRIP and ALERT LEDs flashing at the same time indicates control circuit voltage is too low for operation.
*Reset ALERT flash code by removing 24 VAC power from module.
*Last ALERT flash code is displayed for 1 minute after module is powered on.
Resetting Comfort Alert Codes
Alert codes can be reset manually by cycling power off and on to the Comfort Alert module. Alert codes will reset automatically if conditions return to normal.
Flash Code Number | LED Description | Automatic Reset of Alert Codes |
Flash Code 1 | Long Run Time | Thirty "alert free" on and off cycles to reset automatically |
Flash Code 2 | System Pressure Trip | Not applicable |
Flash Code 3 | Short Cycling | Four "alert free" on and off cycles to reset automatically |
Flash Code 4 | Locked Rotor | Four "alert free" on and off cycles to reset automatically |
Flash Code 5 | Open Circuit | One "alert free" on and off cycles to reset automatically |
Flash Code 6 | Open Start Circuit | One "alert free" on and off cycles to reset automatically |
Flash Code 7 | Open Run Circuit | One "alert free" on and off cycles to reset automatically |
Flash Code 8 | Welded Contactor | One "alert free" on and off cycles to reset automatically |
Flash Code 9 | Low Voltage | Resets when voltage rises above 19 VAC |
* Reset ALERT flash code by removing 24 VAC power from module.
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