Troubleshooting; Table 18 Troubleshooting Guide - Liebert InteleCool 2 User Manual

8.0 T
ROUBLESHOOTING
Table 18 Troubleshooting guide
Problem
Unit will not start
No cooling
Unit cycles on
high pressure switch
Heat does not operate
Probable Cause Remedy
No power to unit Check voltage to input circuit breaker.
Control voltage circuit
Locate short and reset breaker.
breaker open
Shut off by external
thermostat or stat is Check operation of thermostat.
defective
Low refrigerant
Check with gauges.
charge
Check voltage at contactor. If not present refer to print and
Compressor contactor
determine voltage loss. Check enthalpy sensor for full CCW or D
not pulling in
setting.
No output from Check operation of stat. Should have voltage output to Y
thermostat terminal during cooling.
Loss or restriction of Check condenser blower assembly for proper operation. Check
airflow for dirty coil or inlet grille restriction.
Defective fan cycling Switch should make @ 240 PSIG ±10 (1655 kPa ±68.9). (Check
control settings on adjustable switch when supplied.)
No voltage output
Check stat for proper output to W terminal.
from thermostat
Fusible link blown Check for open and replace.
Bad contactor Check for open and replace.
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Troubleshooting

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Liebert InteleCool 2