Tripp Lite SRCOOL33K, Руководство по обслуживанию

Страница: 26 / 72

26
9. Basic Test Procedure
9.1 Defective Compressor
Compressors are single-phase, 208-240V (depending on the model unit). All compressor motors are permanent split capacitor
type using only a running capacitor across the start and run terminal.
All compressors are internally spring-mounted and externally mounted on rubber isolators.
9.1.1 Compressor Wiring Test
Remove the compressor terminal box cover and disconnect wires from terminals. Using an ohmmeter, check continuity across
the following:
- Terminal “C” and “R” - no continuity. Open winding - replace compressor.
- Terminal “R” and “S” - no continuity. Open winding - replace compressor.
- Terminal “C” and “S” - no continuity. Open winding - replace compressor.
9.1.2 Ground Test
Use an ohmmeter set on its highest scale. Touch one lead to the compressor body (a clean point of contact as a good
connection is a must) and the other probe in turn to each compressor terminal (see below). If a reading is obtained, the
compressor is grounded and must be replaced.
9.1.3 Checking Compressor Efficiency
A compressor’s inefficiency is normally due to broken or damaged suction and/or discharge valves, which reduces the
compressor’s ability to pump refrigerant gas.
This condition can be checked as follows:
1. Attach gauges to the high and low pressure service ports of the system.
2. Start the system and run a “cooling or heating performance test.”