Defrost Timer Change on AVZC18/20 SEER Inverter Heat Pump Units

Goodman released Service Bulletin SR-072, regarding a software change on AVZC18 and AVZC20 Inverter Heat Pump units:

This bulletin is to inform you of a software change made to the Inverter Heat Pump models listed above. For units with a serial number prefix of 1706 and later the factory default setting for the defrost interval has been changed from 30 minutes to 120 minutes.

The defrost time interval can still be field adjustable to 30, 60, 90 or 120 minutes between defrost cycles to suit weather conditions and unit performance. This setting can be adjusted in the Comfortnet User Menu of the CTK04AE thermostat by selecting “Inverter” – “Heat Set Up” – “Defrost Interval”. When in this Sub Menu select 30, 60, 90,120 minutes setting.

NOTE: Oil Return Mode: In order to properly return the oil to the compressor, compressor speed may periodically adjust to assist oil circulation. These Inverter units utilize an oil return mode to properly return oil to the compressor which functions similar to a defrost cycle and may create the appearance of the unit having unnecessary defrosts.

If you have questions about this bulletin, HVAC Distributors customers can reach out to our Technical Service department at 800.228.4822 x5.

Incorrectly Labeled Transformers – 208/240 Volt Models

Goodman recently released Service Bulletin SA-029, regarding incorrectly labeled transformers affecting models AWUF, ACNF, ARPT, ARUF, ASPT, ASUF, AVPEC, AVPTC, AWUT, DVxx, FXTQ, MBR, MBVC, APC, APD, APG, APH, DCC, DCG, DCH, DPxx, DSC, DSG, DSH, DTC, DTG, DTH, GPC, GPD, GPG, and GPH.

From Goodman:

It has come to our attention that some recent Part# 0130M00138 transformers were incorrectly labeled. This could potentially affect the voltage adjustment from 240 volts to 208 volts. We are only aware of transformers on units serial date code 1609xxxxxx through 1612xxxxxx as potentially having incorrect labels.

Please refer to the illustrations of the transformers shown below and the listed instructions with each picture for proper wiring when adjusting the transformer from 240 volts to 208 volts. Incorrect wiring could result in damage to the transformer and 24 volt circuit components.

Note: No wiring change necessary if unit voltage is 240 volts. All product equipment is preset for 240 volts.

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If you have questions about this bulletin, HVAC Distributors customers can reach out to our Technical Service department at 800.228.4822 x5.

Beckett Technical Advisory Bulletin on Cleancut Pumps

Beckett recently released the following bulletin regarding Cleancut Pumps (A2EA-6527):

This bulletin advises that Cleancut pumps A2EA-6527 manufactured during months March, April, and May 2016 might present a tightness issue on Inlet/Return ¼-18 NPTF plugs.

In order to identify such pumps, it is necessary to check the date stamped on the top of the body:

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  1. Before starting your burner, confirm the pump is not in the affected date range.
    If the unit is in the date range, follow steps 2 and 3.
  2. Carefully verify the tightness of Inlet/Return plugs.
  3. For any recognized or suspected leak, unscrew plugs and apply pipe sealant, and re-insert them with a fitting torque of 12 to 20 Ft.Lbs.

If you have questions about this bulletin, HVAC Distributors customers can reach out to our Technical Service department at 800.228.4822 x5.

Economizer Installation Wiring for Residential Package Units

Goodman has recently released Service Bulletin SP-038 Rev. 1 regarding economizer installation wiring for residential package units.  The purpose of this bulletin is to provide instructions for the installation of an economizer on “H” and “M” Series residential package units that do not have a factory installed economizer wiring harness.

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CTK03 and CTK04A Displaying Improper Outdoor Temperature

Goodman has recently released Service Bulletin SR-066 regarding CTK03 and CTK04A thermostats displaying improper outdoor temperatures.

From Goodman:

On a limited amount of communicating systems, we have had reports of CTK03 and CTK04A thermostats not displaying the correct outside temperature. The root of this problem appears to be communications between the thermostat and outdoor sensor. This condition may cause an inaccurately initiated lockout of the compressor, errant dual fuel operation or improper electric auxiliary heat cycling in heat pump systems. Work is being done to identify the issue’s root cause.

As an interim solution, you can install a Honeywell RedLINK Wireless Outdoor Sensor to resolve the issue and also provide the customer with current outdoor relative humidity. The part number for the Honeywell Wireless Outdoor Sensor is C7089R1013; it can be ordered from your local distributor.

We will provide labor at the servicer’s Class “A” labor rate for installation of the RedLINK Outdoor Sensor when addressing the sticking outdoor temperature display condition. Claims must be filed using Warranty Express as an Authorization type claim, using Authorization Code number 8792.

  • The claim for the part and labor should be filed as one claim, using the Dealer’s account number.
  • The CTK03 and CTK04A should be filed as a part using the matched piece of equipment for the unit information.

All claims for this project must be submitted within the first 12 months after installation.

The Honeywell RedLINK Wireless Outdoor Sensor (C7089R1013) is in stock at HVAC Distributors and can be ordered by phone or through Web Order Entry.

If you have questions about this bulletin, HVAC Distributors customers can reach out to our Technical Service department at 800.228.4822 x5.

Dip Switch Settings on Inverter 18 & 20 SEER Split Systems

Amana has recently released Service Bulletin SR-064 regarding dip switch settings on Inverter 18 & 20 SEER split systems DZ18VC0**1A*, DZ20VC0**1A, DX20VC0**1A*, AVXC200**1A* and AVZC200**1A* Models.

From Amana:

Technical Services has received information from the field relative to installed units where the Dip Switches were set in the wrong position from the factory or changed in the field causing the unit to run before the System Test was initiated. Improper DS2 dip switch settings could result in condenser operation at power up prior to System Test and can be perceived as a faulty control board (PCB). Please verify DS2 dip switch settings before replacing the PCB.

Switches 1 and 2 in switch bank DS2 must be in the ON position for normal operation on 20 SEER AVZC200**1A* and AVXC200**1A* models. The table below explains the proper dip switch arrangement for the two DS dip switch banks on the 20 SEER models.Capture

The factory default setting can be verified on the wiring diagram which is attached to the control panel cover and in the installation and operation manual. The Dip Switch settings can also be found in the Service Manual for these products. These settings are being added to a revised I&O – Installation and Operation manual, which is due out in 2-4 weeks.

Click here for wiring diagrams and pictures of the PCBs affected.

If you have questions about this bulletin, HVAC Distributors customers can reach out to our Technical Service department at 800.228.4822 x5.

Lockouts On Modulating Furnaces

Goodman recently released Service Bulletin SF-067 regarding lockouts on 40″ modulating furnaces.

From Goodman:

Nuisance or unexplained lockouts (E0 Lockout Code Displayed on 7-Segment Display) with the 40” modulating furnaces may be due to moisture in the front cover pressure switch tube, which causes the pressure switch to open.

If you experience this condition with 40” tall modulating furnace models *MVM96 & DM96MC (upflow application only), the front cover pressure switch should be disconnected (see instructions below). The furnace still has the Induced Draft Blower Low Pressure Switch, which can shut the furnace down in the event of a blocked drain.

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To service: Disconnnect electrical power, then remove the wires from the front cover pressure switch and cut the spade terminal from the wires. Strip the end of the wires and wire nut the wires together.

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Click here for the wiring diagram is in reference to Service Bulletin SF-067.
Print this wiring diagram and leave it with furnace.

If you have questions about this bulletin, HVAC Distributors customers can reach out to our Technical Service department at 800.228.4822 x5.