Troubleshooting Guide - OCEANAIRE OWC series Engineering, Installation And Service Manual

TROUBLESHOOTING GUIDE

The following steps and procedures are recommended for correcting the
problems indicated. In the event that the problem can not be corrected,
service may be required.
SERVICE SHOULD BE PERFORMED BY A QUALIFIED AIR
CONDITIONING SERVICE TECHNICIAN
PROBLEM: UNIT DOES NOT POWER UP
CAUSE: Power interruption
REMEDY: Check LCDI (on models with LCDI), and reset LCDI. Check
external power supply making sure that the disconnect is ON. Check for
blown fuses or tripped circuit breakers. Reset or replace if needed.
PROBLEM: NO DISPLAY ON THERMOSTAT AFTER POWER "ON"
CAUSE: Loose display cable, faulty thermostat or faulty power module
REMEDY: Check display cable, re-seat connectors. Thermostat may be
defective...remove and replace. Power module may be defective...remove
and replace.
PROBLEM: EVAPORATOR FAN RUNS BUT COMPRESSOR DOES NOT
START
CAUSE: Thermostat — set point is too high.
REMEDY: Make sure set-point is lower than room temperature. Look for a
red dot to the right of the temperature displayed for cooling.
Note—there is a delay for the compressor
CAUSE: Thermostat—Loose display cable
REMEDY: Examine the thermostat for a loose cable connection. Re-seat the
display cable.
CAUSE: Condensate Alarm—"CON" is displayed.
REMEDY: Check condensate tank and empty tank or check condensate
pump and make sure pump is working properly and that there is no kink in
the drain line from the pump.
CAUSE: High Pressure Cut-Out—"CON" is displayed. Inadequate
condenser water supply.
REMEDY: Verify condenser water supply. Check High Pressure Cut-Out
Switch. Press Reset (RED Button on back of unit). Re-start unit.
CAUSE: Low Voltage — "LAC" is displayed. Check power supply for voltage
outside the range of 106-126 volts on the 115 Volt units and 187-253 Volts
on the 208/230 Volt units.
REMEDY: Have power checked by electrician and repaired.
CAUSE: Compressor relay failure.
REMEDY: Replace power module.
CAUSE: Compressor Contactor failure (3 and 5-ton units)
REMEDY: Replace compressor contactor.
20