Circulator Blower Speed - Amana ASXC16 Service And Troubleshooting

Asxc, dsxc, and gsxc condensing units, aszc, dszc, and gszc split system heat pumps with r-410a refrigerant blowers, coils, & accessories

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Table Of Contents

Table of Contents

SERVICING

1. Stage Up Percent (7 segment menu SUP): This is a

value that determines how far past the target runtime

the system should continue running the heat pump

before transitioning to the furnace. For example,

assume this menu was set to 20% with a target runtime

of 20 minutes. If the thermostat did not remove the

heating call after 20 minutes, the system would allow

for an additional 20% heat pump run (20% of the 20

minute target is an additional 4 minutes). In this case,

the system would turn on back up electric heat after 24

minutes if the thermostat call was still present. Each

time this occurs, the system records this as a strike

against the heat pump (the strike is important when

looking at the Over Target Threshold)

2. Over Target Threshold (7 segment menu Ott): If the

heat pump has consecutively activated back up electric

heat for the selected Over Target Threshold amount of

times, meaning for this many consecutive cycles it has

been unable to satisfy the target time by itself, then

the heat pump will be temporarily locked out and the

furnace will become the primary heat source.

3. Stage Down Percent (7 segment menu SdP): This

only applies when the heat pump and back up electric

heat are activated on initial start-up. In this case, the

system will try to determine when the best time to

operate the heat pump individually again. To determine

this, the system looks at how easily the air handler is

able to satisfy the thermostat using the heat pump with

back up electric heat. Assume this setting is 15% and

the target time is 20 minutes. If the heat pump with back

up electric heat can satisfy the thermostat in less than

17 minutes (20 minutes - 15% = 17 minutes) then the

algorithm records a strike against the air handler (this

strike is important when looking at the Under Target

Threshold).

4. Under Target Threshold (7 segment menu Utt): If

the air handler is able to satisfy the thermostat using the

heat pump with back up electric heat for the selected

number of consecutive cycles the electric heat operation

will be temporarily removed. The heat pump will then

be used during the next cycle. If the heat pump can

satisfy the thermostat in less than the System Target

Runtime the back up heat operation will be completely

removed and the heat pump will become the primary

heat source again. if it fails to do so, the strike count

against the furnace will be reset and the furnace will

remain the temporary primary heat source until the

Under Target Threshold is reached again.

The system will automatically make adjustments in an

attempt to satisfy the thermostat as close to this target

runtime as possible. After a power cycle or mode change

(cooling to heating or heating to cooling) the system will

run full capacity for the selected mode during the first

thermostat call. Based on the selected target runtime and

how long the initial cycle takes to satisfy the thermostat,

the control algorithm will adjust the system stage times for

a 2 stage unit or the capacity demand percentage for an

inverter / modulating unit for the next cycle. Note: actual

run times may change depending on variations of load

throughout the day.

The following table shows the default values for all Comfort

Setting Options (1 – 5)

Stage Up

Comfort

Target

Percentage

Setting

Time

Option

(Minutes)

(%)

The following table shows the ranges for each of item

when the adjustable Comfort Setting Option 6 is selected.

The table shows the minimum value, the maximum value

and the defaulted value. All items can be adjusted up or

down by increments of 1 which provides full flexibility for all

items.

NOTE: It is critical that these numbers be set properly.

If Comfort Setting option 3 is desired but a target time

of 60 is preferred, select Comfort Setting Option 6 to

enable all the adjustable menus, set the Target Time

to 60 and make sure the other menus are set to match

that of Comfort Setting Option 3.

Minimum Value Maximum Value Default Value

Target Time (t9t)

Stage Up Percent (SUP)

Stage Down Percent (SdP)

Over Target Threshold (Ott)

Under Target Threshold (Utt)