Service Alert Summary:
Improvements with Dehumidification Control Sequence of Operation
Link to contact Tech Support for help Link for info about Service Alerts
What are known Diagnostics or Symptoms:
Description: Symbio 700 improvements are needed to resolve dehumidification issues and make dehumidification improvements. Improvements are as follows:
1. Conventional thermostat dehumidification control with a relative humidity sensor.
2. CVZT unit configurations sub-cooling the space in dehumidification.
3. Dehumidification sequence of operation improvements.
Product Family: Large and Small NextGen Precedent with HGRH
Model Prefix(s) & Configuration details: YSJ/YHJ TSJ/THJ WSJ/WHJ
Ship Date range: 1/1/2023 to 11/30/2024 Large Precedent 1/1/2023 to 1/1/2025 Small Precedent
Serial range: 2301****-2448**** Large Precedent 2301****-2501**** Small Precedent
What actions can I take now:
- Identify which firmware installed on unit first! If current, no action required.
- Update firmware to latest revision Ver. 7.01.0014
Is there a related published service bulletin for this issue?
- No, no bulletin has been published.
Are WMS(Warranty Management System) claims allowed for this issue?
- Warranty / Concession claims may be allowed.
Does the above information indicate the final resolution?
- Yes, final resolution has been confirmed per above.
What can I tell my customer?
Firmware upgrade will provide the permanent resolution.
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