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Climatemaster - Flashing Code 8

Article ID: 59
Last updated: 14 Jun, 2021

CLIMATEMASTER GEOTHERMAL

Re: Code 8

Code 8 = Unit Performance Sentinel (UPS) Warning

  • The UPS warning is NOT a Lockout condition. 
  • The UPS feature is intended to indicate when the heat pump is operating inefficiently.
  • A UPS condition exists when:
    • In heating mode with compressor energized, FP2 is greater than 125°F [52°C] for 30 continuous seconds
    • In cooling mode with compressor energized, FP1 is greater than 125°F [52°C] for 30 continuous seconds
    • In cooling mode with compressor energized, FP2 is less than 40°F [4.5°C] for 30 continuous seconds.
  • If a UPS condition occurs, the control will immediately go to UPS warning.
  • The status LED will remain on as if the control is in normal mode.
  • Outputs of the control will NOT be affected by UPS.
  • During UPS warning, the alarm relay will cycle on and off.
    • The cycle rate will be “on” for 5 seconds, “off” for 25 seconds, “on” for 5 seconds, “off” for 25 seconds, etc.

WHAT TO LOOK FOR:

  • Bad FP1 or FP2 sensor (see sensor resistance chart)

Cooling Mode

  • FP2 less than 40 deg.
    • Low freon
    • Bad expansion valve
    • Low indoor airflow
  • FP1 greater than 125 deg.
    • Low water flow

Heating Mode

  • FP2 greater than 125 deg.
    • Low indoor airflow

HOW TO DISABLE UPS:

The UPS feature can be disabled by changing a dip switch on the CXM board.

DIP Switch 1: Unit Performance Sentinel Disable - provides field selection to disable the UPS feature.

On = Enabled. Off = Disabled

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Article ID: 59
Last updated: 14 Jun, 2021
Revision: 13
Access: Public
Views: 3416
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