Compressor Operational Sounds - Trane IntelliPak Installation, Operation And Maintenance Manual

applications for the SERVICETEST screens and
programming instructions.
3. Use Table 42, p. 96 to program the following system
components for the number 1 refrigeration circuit by
scrolling through the displays;
Supply Fan (On)
– OCC/UNOCC Relay (Unoccupied for VAV units)
– All Compressors for each circuit (On)
– Condenser Fans for each circuit (On)
4. Once the configuration for the components is
complete, press the NEXT key until the LCD displays
the "Start test in __Sec. " screen. Press the + key to
designate the delay before the test is to start.This
service test will begin after theTEST START key is
pressed and the delay designated in this step has
elapsed. Press the ENTER key to confirm this choice.
5. Press theTEST START key to start the test. Remember
that the delay designated in step 4 must elapse before
the system will begin to operate.
6. After all of the compressors and condenser fans for the
number 1 circuit have been operating for
approximately 30 minutes, observe the operating
pressures. Use the appropriate pressure curve in
"Pressure Curves, " p. 131
proper operating pressures. For superheat and
subcooling guidelines, refer to "Thermostatic
Expansion Valves and Charging by Subcooling" at the
end of this section.
Note: Do Not release refrigerant to the atmosphere! If
adding or removing refrigerant is required, the
service technician must comply with all Federal,
State and local laws. Refer to general service
bulletin MSCU-SB-1 (latest edition).
7. Verify that the oil level in each compressor is correct.
8. Press the STOP key at the Human Interface Module in
the unit control panel to stop the system operation.
9. Repeat steps 1 through 8 for the number 2 refrigeration
circuit.
Compressor Crankcase Heaters
The variable speed compressor in 40T units uses a 90 watt
heater.The variable speed compressor in 50-70T units
uses a 160 watt heater.
Otherwise, 20 - 73 and 80 ton units are equipped with 90
watt heaters installed on each compressor. 75 and 89 - 130
Table 59. CPM Blink Codes
Fault
PTC overheat or PTC reset delay active
Phase loss
Incorrect phase sequence
RT-SVX36K-EN
- p. 142 to determine the
LED on
short blink long blink
long blink long blink
short blink short blink
ton units are equipped with 160 watt heaters per
compressor.

Compressor Operational Sounds

At Low Ambient Start-Up
When the compressor starts up under low ambient
conditions, the initial flow rate of the compressor is low
due to the low condensing pressure. Under this condition,
it is not unusual to hear the compressor rattle until the
suction pressure climbs and the flow rate increases.
Variable speed compressors
At all operating speeds, eFlex permanent magnet variable
speed compressors sound different than fixed speed
scrolls. At low speed, variable speed compressors can
sputter. At high speed, variable speed compressor buzz.
These are normal operating sounds.To ensure a quiet
installation, eFlex variable speed compressors are
installed in a sound enclosure. Make sure and keep the
sound enclosure installed at all times other than servicing.
Listen to recordings of eFlex variable speed scroll sounds
at www.trane.com/eFlexSounds.
Compressor Sound Change!
Variable speed scroll compressors sound different than
single speed scroll compressors. Sound changes with
speed and condition.
To assist troubleshooting, listen to normal operating
sounds of variable speed scroll compressors at
www.trane.com/eFlexSounds
Compressor – Blink Codes
The CSHN*** compressors come equipped with a
compressor protection device capable of detecting phase
reversal, phase loss, and phase unbalance.The
compressor protection device uses a Green and Red LED
to indicate the compressor status. A solid Green LED
denotes a fault free condition; a blinking Red LED indicates
an identifiable fault condition.
Note: If the compressor has tripped, the resistance will be
4500 ohms or greater; when reset, they will be less
than 2750 ohms.
Blink Code:The blink code consists of different on / off time
of the Red LED which is repeated continuously until either
the fault is cleared or until power is cycled.
LED off LED on
short blink
long blink
short blink
Unit Start Up
NOTICE:
LED off
long blink
long blink
long blink
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