15
Remote Condensing Unit Installation Instructions
©2019 Tecumseh Compressor Company LLC. All rights reserved. TPC Part #71511 | Rev A 05/13/2019www.tecumseh.com
MAINTENANCE
The refrigeration systems should be scheduled for check-up, inspection and maintenance service, at least twice
a year, in order to assure a trouble free operation for many years. When servicing these systems the main power
supply must be disconnected and locked off. Extreme care must be used when servicing a unit that requires the
power to be “ON”.
• Inspect for abnormal indications, vibration, noise.
• Inspect and feel the bottom crankcase housing and determine that it is warm. Make sure that the upper housing
is not sweating.
• Inspect all electrical parts for loose connections. Tighten them if necessary
• Inspect insulation status of all wires.
• Inspect contactors and make sure that they are functioning correctly.
• Inspect the fan motors, make sure that the fan blades are tight and all mounting joints are tight. Refer to the
figure on the right for proper positioning of the fan on the motor shaft.
• Check the crankcase and receiver heaters for proper operation. Use an ampere meter to check for current draw.
• Inspect refrigerant level in the system.
• Check and make sure that the condenser surface is clean and free of dirt and debris.
• Inspect the operation of the control system. Make sure that all of the safety controls are operational
and functioning properly.
• Check all refrigeration piping. Make sure that all mechanical joints and flare nuts are tight.
• Always re-assemble the enclosure panels when maintenance job is completed. Never leave loose or not
properly tightened panels.
ATTENTION!
Make sure all screws are re-tightened before start-up
Make sure all wires are hooked up per wiring diagram
PHASE LOSS MONITOR
The combination phase sequence and loss monitor relay protects the system against phase loss (single phasing),
phase reversal (improper sequence) and low voltage (brownout). When phase sequence is correct and full line
voltage is present on all three phases, the relay is energized as the normal condition indicator light glows.
This problem is easily corrected by the following steps:
1. Turn power off at disconnect switch.
2. Swap any two of the three power input wires.
3. Turn power on. Indicator light should glow and compressor should start.
4. Observe motors for correct rotation.
NOTE:
If compressor fails to operate and the normal condition indicator light on the phase monitor
does not glow, then the supplied electrical current is not in phase with the monitor.
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