1. LIGHT COMMERCIAL 2014 TSA Meeting
PRODUCT UPDATES
LIGHT COMMERCIAL
2014 TSA Meeting

2. HGRH UNITS SCHRADER VALVE
Issue description:
Units from CMX-C  had Schrader cores that did not allow the TXV to operate.
Containment at the factory made on August 28, 2013
Corrective action - Change assembly design, eliminate nut of the TXV Valve assembly and eliminate coremax on the tubing.
Design change made to brazed in equalizer line. Units built after February 7th will have this change implemented. Clean Point
SN C

3. SRT and MRT Gas Valves Issue Description:
Gas valves failing “stuck open” or “stuck closed”
Root Cause:
appears to be moisture infiltration causing “shorting” of the circuit board located under the cap of the gas valve.
Preliminary findings show that on the SRT chassis 2 a plug is installed on the unit top. The plug is used to seal a screw hole that is used on chassis 1 units. This plug may be missing.

4. SRT and MRT Gas Valves Root cause and containment:
SRT chassis 2 found in inventory with missing plug.
SRT chassis 1 showing “cocked” (misaligned) screws in top
Both occurrences are the leading cause of water infiltrating the burner section and causing the gas valve failures.
Quality alert implemented at factory on January to warn the operator for correct assembly of plastic plug and screws on Top.
Gas valves were added to the Special Request Parts return list for vendor analysis Nov. 4, 2014.
Design team is looking for the best option to eliminate the water filtration. Validate new parts.

5. SRT and MRT Gas Valves Corrective actions: New seal strip in place
New method for routing cables
Changes implemented
Week C1416

6. SRT and MRT WATER LEAKS Issue description:
Water leaks through the hinged panels causing damage in the building.
Containment:
Factory Quality alert implemented on November 26, 2013
Root cause:
Missing gasket in brackets
Wrong position of gasket in unit
Wrong position of aluminum plate on unit.

7. SRT and MRT WATER LEAKS Corrective actions:
Factory modified operator standard work instructions and evaluate with Process check list to assure correct placement of gaskets
Rain test validation in a Unit every 4 months.
Corrective actions implemented on
February 25, 2014

8. CMX-C Water Leaks SRT,MRT Units
Issue description:
Units are leaking water into the return air section
Containment:
Ensure silicone application in the bottom of the evaporator coil.
Ensure silicone application in the holes between compressor plate and base pan.
Root cause:
Lack of or missing silicone
Corrective actions:
Apply seal strip instead of silicon between base pan assembly, design team is making a rain test for validation of this change. Changes are in process.

9. SRT UNITS WRONG LABELS APPLIED
Issue description:
Label 208V-230V placed in 460V units .
Root cause:
Manufacturing operator error due to standard work instructions not being clear when “not to use” the label.
Corrective actions:
Proper training of staff on modified standard work instructions.
Add this Label to the unit BOM. Changes implemented on February 25, 2014

10. CMX-C Flame Retainer Issue description:
Burner with Flame retainer incorrect. 2 Holes instead of 3.Sensors on burner were damaged due excessive heat.
Containment:
Operator is validating with a mark the correct Retainer assembled on unit.
Quality alert issued at the factory

11. CMX-C Flame Retainer Root cause: Corrective actions:
Design Issue allows for use of the wrong retainer.
Corrective actions:
Mfg. is working with the flame retainer die to find the best position of screw holes in each part number.
modify the vestibule plate to match with new retainers. Target for April1,2014
Setup selection for press shop will be monitored by checklist. And go no go fixture. Target is May 1, 2014

12. TITLE 24 COMPLIANCE
Title 24 is a California Building Energy Efficiency Standards Code.
For ICP, Title 24 compliance pertains to the efficient design and operation of HVAC equipment. Applicable equipment that is to be sold in California in July2014 must comply with this standard.
Specific Title 24 compliant functions include:
Dual Minimum Economizer Positions, based on fan speed/airflow
Pre-Occupancy Purge
Demand Control Ventilation
Occupancy Sensor Ventilation/Setback, which widens the occupied set points when the space is unoccupied
Heat Pump Aux Heat Control, which only allows auxiliary heating operation when it is necessary
Economizer Fault Detection and Diagnostics
Fault detection - performance based

13. Economizer (FDD) Fault Detection and Diagnostics
FDD example:

14. Title 24
Jade W7220 controller has all the FDD that meets the Title 24 compliance and new details will be coming soon.

15. Condensate Drain Pan
Problem description: Drain pan breaks after installing tube due to dimensional problems with internal and external diameter of tubing hole Root cause: Uncontrolled process during production Corrective action: sub supplier to run the process with the correct cool down time, as well as implement audits to check the parameters and size of the internal diameter. Implemented week 0414

16. COMFORT ALERT DIAGNOSTICS MODULE
Issue description:
Comfort Alert Diagnostic Modules (CADM) are being misdiagnosed on system startups P/N
Products affected:
CAS, CHS
Returned CADM’s failure analysis report confirm no defect found (NDF)

17. RHS Heat Pump Factory Mis-wire
First field report:
RHS – week 08/2013
Found the violet wire connected to the ODF contactor coil is connected to CLO2 at pin #7 on the CTB board. This causes the condenser fans to continue to run during the defrost mode, thus resulting in partial icing of the coil

18. RHS Heat Pump Factory Mis-wire

19. RHS Heat Pump Mis-wire Root Cause: Assembly drawing error.
Factory is working on new assembly drawing.
Quality alert implemented
February 10, 2014
Marked with green tag on
violet wire