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This is a typical inspection...
With PM pricing as competitive as it is, spending
more than 20 minutes can make it unprofitable.
The technician puts on gauges. It's 80 degrees. There is
250 psi of head, 70 psi of suction and a sweating suction
line. This unit is cooling fine. This is what you observe...
Is there time to do more? Does it pay to get out a digital
thermometer, calculate superheat, subcooling, etc., analyze
it, and decide which action to take?
The Service Assistant provides this analysis almost instantly...
The MAIN analysis
screen displays...
- Lo superheat (SH)
Liquid refrigerant entering the compressor is
washing away lubricant from moving parts. This
leads to premature failure and costly repairs.
- Hi condensing temperature
over ambient (COA) A hot condenser is reducing
efficiency and threatening to shut down the unit
on the first hot day.
- Lo subcooling (SC)
This unit may have been undercharged to keep the
head pressure down. This compromises capacity
and efficiency.
- Fix high side heat transfer
problem The diagnostic message indicates that
fixing the high side heat transfer problem (e.g.
condenser coil cleaning) will fix the problem.
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The ENERGY
analysis screen displays...
- Low efficiency The
hot condenser translates into a 70% efficiency
unit. The Service Assistant's patented Efficiency
Estimator shows the impact faults have on efficiency.
- Low capacity This
unit is also only providing 84% capacity. The
Service Assistant's patented Capacity Estimator
shows the impact faults have on capacity.
- Higher Energy Cost
Low efficiency translates directly into higher
utility bills. This unit is using $646 more in
energy over a year because it needs service.
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What does this mean to you?
- A problem is detected that is wasting energy and raising utility costs. Energy savings pays for a coil cleaning in one cooling season.
- Fixing the problem early prevents the unit from going down when it's most needed.
- The service provided reduces the chances of compressor failure.
- Your customer gets better information, experiences fewer call backs, less downtime and emergency repairs.
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