Service and Maintenance

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In performing service and troubleshooting on heat pump systems, there are various electrical components to be checked. This article provides information to aid in inspecting and servicing these components.

In this installment of the Btu Buddy series, Bob goes on a heating service call where all the windows in the house are sweating. Btu Buddy assists in investigating to find the cause.

The pressures of getting a job done on time or getting a piece of equipment back on-line quickly can result in mistakes by even seasoned technicians. This article provides a reminder of what not to do when taking electrical measurements.

The purpose of this article is to demonstrate the proper use of the pressure-temperature relationship, and to illustrate how it can be used to thoroughly analyze a refrigeration or air conditioning system.

In this edition of the Btu Buddy series, Bob and Btu Buddy meet for a training lunch after the previous day's low oil in the sight glass service call. Btu Buddy discusses oil and oil circulation in an A/C system.

In this installment of the Btu Buddy series, Bob encounters a compressor with very low oil level. Btu Buddy explains that the low oil level is a normal function of this system for this time of year.

In order to service and troubleshoot an air-source heat pump system, a service technician must understand the unit's sequence of operation. Where the system varies from its normal sequence is a major clue to any problems.

The problem: A piston-type reciprocating compressor has valve damage, or the valves are not sealing for some reason. The result: an inefficient compressor. This is one of the most difficult service problems to diagnose because the system may still have some cooling capacity.

In this edition of the Btu Buddy series, Bob works on a system that is not cooling properly and finds that refrigerant is flooding back to the compressor. Btu Buddy aids in pinpointing and curing the problem.