OCEANAIRE Deluxe OWC2412QC Manual

ENGINEERING, INSTALLATION AND SERVICE MANUAL
OWC2412QC
2 Ton Deluxe Portable Water-Cooled
Spot Cooler with Quick Connect
EISM-OWC2412QC 01012022

FORWARD
This manual provides the user with basic details for the installation and operation
of the Oceanaire OWC2412QC spot cooler. It is recommended to read and fully
understand the instructions outlined within this manual, before operating the
OWC2412QC unit.
As with all commercial air conditioning equipment, it is recommended to have the
OWC2412QC sized and installed by a licensed specifying engineer and contractor, in
accordance with all local and state codes. The length of service received can be
extended by following the installation and preventive maintenance instructions.
NOTICE
In our ongoing process of continuous improvement, the items and procedures
described in this manual are subject to change without notice. Please note model
and serial number of the OWC2412QC unit when contacting the factory.
TABLE OF CONTENTS
PAGE
GENERAL INFORMATION….................................................. 1
PRODUCT DATA AND SPECIFICATIONS........................ 2
UNIT DESCRIPTION
Standard Features................................................ 3
Applications, Electrical Configuration......... 4
Unit Interior……………………………………………………….. 5
Installation Instructions.................................... 6
Accessories……….................................................... 7—8
Hose Kits…………………………..................................... 9
Hose Kit Installation Instructions.................. 10
Optional Hose Adapter Kit……………………….……. 11
SERVICE
Thermostat/Controller Operation.................. 12—14
Water Valve Adjustment………………................... 15
Replacement Parts Procedure......................... 16
Troubleshooting Guide...................................... 17
Preventive Maintenance................................... 18
DIAGRAMS
Piping Schematic............................................... 19
Wiring Diagram………………..…………………………….. 20
WARRANTY……………………………………………………………………….. 21
END USER INFORMATION, TECH NOTES………………... Back Page

GENERAL INFORMATION
The OceanAire OWC2412QC is a portable water-cooled air conditioner designed for
permanent or temporary spot cooling applications. The entire air conditioning unit
has been built in an attractive sheet metal cabinet, equipped with heavy-duty casters
for mobility. All OWC2412QC models come with a 10-foot power cord for electrical
connection and added mobility in service. These spot-coolers are designed to direct air
to specific areas or objects through a discharge grille located on the upper-front of the
unit.
The OWC2412QC is a self-contained unit with the entire cooling system (blower assem-
bly, electrical, refrigerant, and water side components), neatly arranged in a grayand
blue polyester powder coated metal cabinet. When connected to the proper source of
electrical power, the OWC2412QC is controlled by a solid-state electronic device, with
numerous options of temperature and airflow controls that will provide the desired
level of comfort and cooling.
A wide variety of accessories and factory installed options are available for the
OWC2412QC, allowing for improved performance and versatility.
1
NOMENCLATURE
OWC 24 12QC
DELUXE PORTABLE QUICK CONNECT
WATER FITTINGS
WATER-COOLED
VOLTAGE (208-230 V)
NOMINAL CAPACITY
SINGLE PHASE
CAPACITY RATING
OWC2412QC.......24,000 BTU/HR
NOT APPROVED FOR OUTDOOR USE
WARRANTY
ALL OCEANAIRE PRODUCTS ARE COVERED BY THE
OCEANAIRE LIMITED WARRANTY
1 YEAR ON THE FULL PRODUCT
PLUS, 4 ADDITIONAL YEARS FOR THE COMPRESSOR
(Restrictions Apply)
WARRANTY CARD
It is important that the warranty card be filled out completely and returned to the
factory within fourteen (14) days of installation of the unit in order to receive the
benefits of the warranty.
1

SPECIFICATIONS
COOLING CAPACITY 24,000 btu/hr
VOLTAGE 208-230 V, 60Hz, 1PH
AMPS 9.9
WATTS 2100
IN RUSH AMPS 655
PLUG TYPE 6-20P, LCDI
EER 11.4
COMPRESSOR ROTARY
COMPRESSOR HP 2
COMPRESSOR LRA 48
EVAP CFM 810
EVAP MOTOR HP 1/83
COND GPM at EWT, 60⁰F 1.5
COND GPM at EWT, 85⁰F 6.0
QUIC CONNECT WATER LINE CONNECTIONS
WATER IN 3/8”
WATER OUT 3/8”
DRAIN 1/4”
CONDENSATE REMOVAL PUMP—AUTOMATIC
LIFT (VERTICAL) 20 FT
REFRIGERANT 16 oz R-410A
HEIGHT 45.7 in
WIDTH 21.5 in
DEPTH 16.0 in
NET WEIGHT 170 lb.
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE
Cooling capacity is total BTUH at 80ºDB/67ºWB return air,
High fan speed, with 85ºEWT to 95ºLWT (6.0 GPM)
Time delay fuses/circuit breakers are recommended
EER is determined at High fan speed
CFM with free discharge
Amps and Watts at 230 volts
Hose colors
Water in—black label (3/8)
Water out—red label (3/8)
Drain—yellow label (1/4)
COOLING AMBIENT OPERATING RANGE 65º to 105º
NOT APPROVED FOR OUTDOOR USE
OWC2412QC
2

CABINET
The OWC2412QC cabinet is constructed of 18 gauge steel with a gray and blue polyester
powder coated finish that will compliment any decor. The entire cabinet is insulated with
sound-absorbing insulation for cool, quiet comfort. All units come equipped with swivel
casters for portability and convenient set-up.
DELUXE ELECTRONIC CONTROLLER
The OWC2412QC is equipped with a deluxe electronic controller. When proper power is
connected to the unit, the thermostat will control the unit to cool a space to the desired
temperature. The thermostat is also capable of controlling the fan to operate automatically
(when needed) or continuously. To protect the compressor from short-cycling, there is a
built-in time delay in the thermostat. In the event of a power outage, all thermostat
settings are saved, and the unit will re-start automatically.
FAN SPEED CONTROL
The deluxe electronic controller is capable of setting the fan speed for manual or
automatic. In manual setting, the fan speed can be programmed to any of the six fan speed
levels, from (1) Low to (6) High. In auto setting, the unit will determine the best fan speed
based on the inside temperature and selected SETPOINT.
CONDITION ALARM—CON
The LED thermostat of the unit will display the fault “CON” which indicates a condition that
needs to be addressed.
CONDENSATE PUMP… Failed/Restricted drain tube/routed incorrectly
WATER SUPPLY……….. Turned off/Interrupted flow
EITHER CONDITION WILL DISABLE THE COMPRESSOR
CONDENSATE PUMP
Each OWC2412QC unit comes equipped with an Automatic Condensate Pump that removes
the condensate. The pump discharges through a check valve located on top of the conden-
sate pump assembly. The vinyl tubing exits through a 3/8” flare connection, located in the
recessed area on the right side of the unit. The pump has capabilities up to a 20’ lift, to han-
dle almost any installation requirement. If a failure occurs with the operation of the pump
circuit, the Normally Closed overflow switch will open, and the fault “CON” will display in
the window. When the failure has been corrected, or the condensate line blockage/kink has
been resolved, the fault will be dropped from the screen, and the unit will restart.
HIGH PRESSURE SAFETY SWITCH
Located in the recessed area of the OWC2412QC unit is a manual reset high pressure
switch. It is used for the protection of the compressor, in the event that the condenser wa-
ter supply is turned off. If the internal pressure exceeds the limit setting, the switch cycles
off the compressor, while the evaporator fan continues to operate. Once the water interrup-
tion has been corrected, turn the unit off, RESET THE RED BUTTON by pushing down on
the rubber boot in the recessed area of the unit, listening for the click, and restart the unit.
FILTERS
The OWC2412QC unit is equipped with a washable filter at the air intake. An electrostatic
mesh air filter is located behind the evaporator return air grille to filter the air before it is
cooled, keeping the coil free from dust build-up. The filter can be easily removed and
cleaned.
POWER CORD
The OWC2412QC unit is equipped with a 10 foot (6-20P) power cord for convenience, and has
a LCDI device for added safety.
STANDARD FEATURES
3

4
The OWC2412QC unit is equipped with a standard 10-foot service cord which has a
6-20P plug configuration. The molded LCDI (Leakage Current Detection & Interrup-
tion) device serves as a means of electrical protection.
UNIT/MODEL PLUG CONFIGURATION RECEPTACLE
208-230 VOLT
OWC2412QC
NEMA 6-20R
20A-240 VOLT
NEMA 6-20P
SPOT COOLER
The OWC2412QC can be used in an open environment to cool specific objects or
"spots". Spot Cooling is a convenient and economical way to provide air conditioning
where cooling the entire space is not viable. Cool air is discharged from the units
grille and is directed where it is needed. A nozzle kit can be used to improve the
velocity.
ROOM AIR CONDITIONER
One feature of the OWC2412QC is it operates as a room air conditioner because water
is used as the means for heat rejection. The major advantage of water-cooled air
conditioning is the convenience of connecting water hoses, or lines, as compared to
the installation of condenser air ducts used for air-cooled portables. A variety of hose
kit lengths are available that can be used for connecting to a water supply and drain,
while providing portability within the conditioned space.
APPLICATIONS
ELECTRICAL CONFIGURATION
CAUTION: DO NOT USE THE LCDI AS AN ON/OFF SWITCH FOR THE UNIT
Thermostat
Evaporator Fan
Discharge “Cool”
Grille and
Washable Filter
Return Air
Inlet
Hose Kit Cubby

5
OWC2412QC INTERIOR
Cubby for the Hose Kit
High Pressure Switch Reset Button
Drai Water
In
Electrical Cord
Strain-Relief
Water
Out
Condensate Pump
Access Door
Condensate
Pump
Motor Thermostat
Compressor
Evaporator Coil
Blower Wheel

6
A DAMAGED LCDI POWER SUPPLY CORD MUST BE REPLACED
WITH A NEW POWER SUPPLY CORD OBTAINED FROM
OCEANAIRE, AND NOT REPAIRED
CAUTION
AN EXTENSION CORD CAN BE USED PROVIDED IT IS RATED AT LEAST 15 AMPS
@ 115 VOLTS WITH GROUNDING-TYPE ATTACHMENT PLUG AND GROUNDING
TYPE CONNECTOR (LOAD FITTING)
INSTALLATION INSTRUCTIONS
RECEIVING—INSPECTION
Upon receiving your unit, inspect the packaging for any damage. All units are
shipped on a skid, and packaged in a triple-wall carton for added protection.
BEFORE INSTALLING
Check the unit for any damage. All Oceanaire products are thoroughly inspected at
the factory and carefully packaged. If any damage is evident, contact Oceanaire
IMMEDIATELY.
ELECTRICAL REQUIREMENTS
Check the nameplate located on the back of the unit to confirm the proper power is
available for the unit. Refer to "Specifications" section for voltage and amperage
requirements. For the proper NEMA receptacle, refer to "Electrical service plug
configuration". When using an extension cord, use the proper gauge cord, and
check cord voltage at the unit.
TIME DELAY FUSES/CIRCUIT BREAKERS ARE RECOMMENDED
WARNING—OPERATING THE UNIT ON IMPROPER VOLTAGE
WILL VOID THE WARRANTY
ACCESSORIES
Verify that all accessories are correct for the model, and are installed in accordance
with all instructions.
START-UP
Install the unit in accordance with all local and state building codes, and install all
accessories. Allow for a clearance around the unit for future maintenance and/or
service. Level unit and lock casters. Connect power and test the LCDI on the power
cord. Power up unit via thermostat, and check for proper operation. Refer to
Thermostat Operation for more details.

DISCHARGE AIR NOZZLE KIT ASSEMBLY
OWC2412QC ACCESSORIES
7
2NK-2
(2 X 6”) NOZZLE KIT
for Directional Cooling
An optional discharge nozzle kit is used to direct the
conditioned air to a specific target area. By
concentrating the airflow, the nozzles increase the air
velocity towards production lines to cool personnel
and/or equipment. In server rooms, the nozzles can be
used to direct the airflow through the rack to remove
the heated air from the equipment.
2NK-2 for model OWC2412QC with (2) 6-inch diameter
nozzles with an approximate compressed length of 22”.
The approximate extended length is 32”.
The nozzle kit comes pre-assembled with the nozzles
secured to a mounting plate, and include edge guards.
By removing the OWC2412QC discharge grille, the noz-
zle kit can then be installed in the grille opening.
Evaporator return air plenum is available for
installations where it is required to duct the
return air to the inlet of the evaporator. The
evaporator return air plenum allows the user
to connect round duct (flexible or rigid) to
the return air intake to reduce air noise and
increase the number of options for solving
difficult cooling problems. The plenum
attaches to the front of the unit, replacing
the return air grille.
2DEP-12 for OWC2412QC transitions the re-
turn opening to a 12-inch round duct.
NOTE—When a 2DEP-12 is installed,
it is recommended to set the evaporator
blower speed to high, to avoid evaporator
coil freeze-up .
FILTER 16 “ x 24” x 1”
EVAPORATOR RETURN AIR PLENUM
EVAPORATOR RETURN AIR PLENUM
2DEP-12
EVAPORATOR RETURN AIR PLENUM
for Ducting Return Air

8
A discharge duct adapter is available for applications where
ducting the cool air is required. The adapter can be easily in-
stalled on the unit without fasteners, and be installed for either
vertical or horizontal ducting. The standard discharge grille is
removed and the DDA is placed in the grille opening.
2DDA-10 for OWC2412QC, converts the evaporator discharge
to a 10-inch diameter round duct.
When used in conjunction with the evaporator return air ple-
num, 2DEP-12, the unit can provide closed-loop cooling to and
from a given space without the influence of any outside air.
NOTE—When a 2DDA-10 is installed, it is recommended to set
the evaporator blower speed to high, to avoid evaporator coil
freeze-up .
DISCHARGE DUCT ADAPTER
2DDA-10
OWC2412QC ACCESSORIES

HK-QC SERIES HOSE KIT
All Oceanaire hose kits are designed for use with Oceanaire Portable Water-cooled
Air conditioners, to accommodate almost any installation requirement. The hose kit
allows for the unit to be connected to a water source while providing a certain level
of portability and ease of installation. The HK Hose kits are available in three
lengths; 10-foot, 25-foot and 40-foot.
The hose kit consists of three separate hoses; WATER IN (3/8), WATER OUT (3/8) and
DRAIN (1/4). The WATER-IN (BLACK) and WATER-OUT (RED) hoses are made of
reinforced PVC tubing and serve for the water supply and water return. The DRAIN
(YELLOW) is made of gray PVC and is used for the condensate pump discharge to a
drain.
A QC lanyard is supplied with each QC Coupling. When engaged, this device releases
the internal valve of the coupling allowing for air to break the vacuum and drain the
hose.
* All Hose Kits come with a
4-Way Sink Adapter Fitting
SINK
ADAPTER
FEATURE WATER-IN HOSE
WATER-OUT HOSE CONDENSATE HOSE
Material PVC with Polyester Braid Gray PVC
ID, Wall Thickness 3/8 ID, 0.219 Wall 1/4 ID, 0.063 Wall
UNIT SIDE FITTINGS
TERMINATION
FITTINGS
HOSE
KIT
PART
NO.
For Use
with
OWC
WATER
IN
WATER
OUT DRAIN
HOSE
KIT
LENGTH
WATER
SUPPLY
WATER-
OUT DRAIN
HK-1QC 24
3/8 QC
Coupling
3/8 QC
Coupling
1/4 QC
Coupling 10 ft.
3/4 Female
Hose Conn* No Fitting No Fitting
HK-2QC 24
3/8 QC
Coupling
3/8 QC
Coupling
1/4 QC
Coupling 25 ft.
3/4 Female
Hose Conn* No Fitting No Fitting
HK-5QC 24
3/8 QC
Coupling
3/8 QC
Coupling
1/4 QC
Coupling 40 ft.
3/4 Female
Hose Conn* No Fitting No Fitting
9
MAXIMUM WORKING PRESSURE FOR WATER LINES: 100 PSIG

10
HK-QC INSTALLATION INSTRUCTIONS
1. Connect Hose Kit to unit by aligning the QC Coupling with the QC Fitting on the
unit. Connect the hose kit according to hose and unit labels: BLACK to WATER IN,
RED to WATER OUT and YELLOW to DRAIN. HOLD the coupling behind the sleeve
allowing the sleeve to move freely and PRESS firmly, until the sleeve retracts and
clicks. The “click” means that the QC Coupling is engaged onto the QC Fitting.
2. Connect WATER IN hose to water supply using hose connection, and sink
adapter (if needed).
3. Install WATER OUT line in drain, allowing for free drain conditions with an air
space around the opening.
4. Install DRAIN line in drain, allowing for free drain conditions.
5. Open water supply valve, and check for any water leaks in hose connections.
To release the coupling, Hold the Coupling as shown below, and pull back on the
sleeve. The Coupling will release and the valve inside of the coupling seal.
Once off-site, use the fitting secured to the hose kit by the lanyard to break the
vacuum, and drain the hoses.
SINKADAPTER
(use if required)
WATER CONNECTIONS
(WATER SUPPLY)
ALLOWWATER-OUTAND DRAIN LINE TO
DRAIN FREELY INTO SINK
OR PLACE WATER-OUTAND DRAIN
LINES INTO DRAIN RISER
High Pressure Switch Reset Button
Drain Water
In
Electrical Cord
Strain-Relief
Water
Out

11
The HA-SMQC Hose Adapter Kit allows for the installation of a QC water cooled unit
where the Standard QC Hose Kit cannot accommodate the installation. The kit
provides a means of connecting hoses to a QC-Model unit when the water source
and drain are located in separate areas, or where longer hose runs are desired. The
HA-SMQC Hose Adapter is equipped with Quick-Connect Couplings along with the
Garden Hose Connections as shown below:
HA-SMQC HOSE ADAPTER KIT
FEATURE WATER-IN HOSE
WATER-OUT HOSE CONDENSATE HOSE
Material PVC with Polyester Braid Gray PVC
UNIT SIDE FITTINGS
TERMINATION
FITTINGS
HOSE KIT
PART NO.
For Use
with
WATER
IN
WATER
OUT DRAIN LENGTH WATER SUPPLY
WATER-
OUT DRAIN
HA-SMQC OWC2412QC
3/8 QC
Coupling
3/8 QC
Coupling
1/4 QC
Coupling 2 ft.
3/4 Female
Garden
Hose
3/4 Male
Garden
Hose
3/8 Hose
Barb

OCEANAIRE DELUXE ELECTRONIC CONTROLLER
When power is connected, the controller will display “888” momentarily, and then
disappear. Press the POWER button, then scroll drown to the TEMP SELECT button
until the SET POINT is displayed. Adjust the SET POINT to the desired temperature,
and the unit will cool as required.
The systems controls temperature within +/- 2°
POWER—Turns the unit on/off when power is supplied
MODE - Selects the mode of operation between Cool and Moisture Control.
COOL - The system will operate in cooling mode only.
MOISTURE CONTROL - The system operates in the cooling mode to reduce
humidity within the conditioned space.
Every 4 hours, the fan is started, circulating the air, and the air temperature is rec-
orded by the controller. The cooling cycle is started for one hour, or until the room
temperature drops 2°, which ever comes first. This cycle repeats every four hours.
FAN SPEED—The operator can select between AUTO or MANUAL fan speed con-
trol. Pressing the FAN SPEED button will switch speed from AUTO to MANUAL. In
MANUAL mode, pressing the FAN SPEED button will change fan speed from low (1)
to high (6). In AUTO mode, the fan speed is controlled automatically. In cooling
mode, the controller automatically adjusts the fan speed to high, and as the inside
temperature approaches the set point, the fan speed will decrease.
TEMP SELECT—Allows the operator to view the controller temperatures
INSIDE = return air temperature, DISCHARGE = supply air temperature,
SET POINT can be seen and adjusted, by pressing or
The OWC2412QC controller is equipped with many features for a more precise
level of cooling and operation. With the addition of a remote sensor, the control-
ler can sense temperatures in another space or in ductwork. Doing that, you over-
POWER
BUTTON
DELUXE ELECTRONIC CONTROLLER
12

1) Make sure the unit has power .
2) Press the power button “OFF”.
3) Press the following buttons in sequence “S-U-D-S”
(Select—Up arrow —Down arrow —Select)
4) The display will begin flashing P1 and a number.
If there is no display, repeat the sequence,
making sure the unit has power, but is turned OFF.
5) To adjust any program feature, press the ARROW UP▲or ARROW DOWN ▼button
until the desired value is displayed.
6) Use the “MODE” button to scroll through the programmable settings P1 through P16.
7) If no buttons are pressed, the display will then return to the “OFF” position after
about 50 seconds.
PROGRAM
SETTINGS
P1—High Fan Speed Limit Setting: 56 - 85
P2—Low Fan Speed Limit Setting: 30 - 55
P4—Temperature Sensor Calibration: +/- 10°
P10—Temperature Display: °F or °C
P13—Supply Fan Operation: Cycling or Continuous
P1, P2 - To adjust fan speed settings, P1 represents the high fan speed parameter, while
P2 represents the low fan speed parameter. When using nozzle kits, discharge duct
adapters and evaporator plenums, setting P1 to 85 will help to avoid freeze ups.
P4 - Adjust the P4 setting to match the actual INSIDE room temperature, if needed.
P10 - Use this parameter to display temperatures in the desired units.
P13 - To cycle the evaporator fan with the compressor, access code P-13. Press the up or
down button to switch to “CYC”, which means cycle the fan with the compressor. The
factory default setting is “CON”, which means continuous fan operation.
8) Press POWER —you should see an alphanumeric code.
Press POWER and the unit will start at the new settings
13
CONTROLLER PROGRAMMING MENU

TO CHECK THE NUMBER OF HOURS ON THE UNIT
1) Disconnect unit power, and reconnect unit power.
2) When “888” appears in display, push and release the arrow down button
3) The first set of numbers dis- played reads thousands of hours:
02 = 2000, 04 = 4000 hours, 00 means less than 1000 hours.
4) The second set of numbers read hours directly:
58 = 58 hours. 742 = 742 hours.
6) Add the 2 number sets together to get total hours.
03 and 486 = 3486 hours.
01 and 59 = 1059 hours.
TOTAL HOURS REPRESENTS COMPRESSOR “RUN” TIME
MODEL CODE SETTINGS
OWC2412QC P1 = 70, P2 = 50
OWC2412QC PROGRAM SETTINGS
NOTICE
Program Parameters are NOT controller default values.
They are Oceanaire Factory Settings
DISPLAY FAULTS
LAC……………………. Low AC line power
AAA or - - - ……… Failed Air Sensor (unit will not run)
CON……………………. Failed Condensate Pump/Over-Flow Alarm
High Pressure Cut-Out—Low/interrupted condenser
water supply. Correct problem, and re-set unit at
HP RESET
14

Water Valve
WATER VALVE ADJUSTMENT
15
Water Valve Cover Plate
Each OCEANAIRE WATER-COOLED unit is equipped with an automatic water
regulating valve to control the condenser water flow rate. The water valve will open
when the unit is in the cooling mode and adjust the gallon per minute flow rate
based on the entering water temperature (EWT).
The water valve operates independently from the water system, and regulates flow
based on the systems refrigerant head pressure.
Under certain conditions, entering water temperatures can cause the valve to
rapidly open and close, causing a “harmonic” pitch in the water supply line. In these
cases, it is recommended that the water valve be adjusted.
1. Disconnect the unit power.
2. Remove water valve cover plate or back panel (depending on model) to
locate the water valve.
3. At the top of the valve, there is a square shaped adjustment screw. Using a
standard service wrench or flat blade screwdriver, adjust the valve using
quarter turns, allowing the unit to operate approximately 5 minutes after
each new setting.
•CLOCKWISE (CW) to lower the system head pressure opening point.
• COUNTER-CLOCKWISE (CCW) to raise the system head pressure opening
point.
4. Re-install cover plate (or back panel) when finished.

OWC2412QC
REPLACEMENT PARTS PROCEDURE
IT IS RECOMMENDED THAT ALL OCEANAIRE UNITS
BE SERVICED BY A LICENSED TECHNICIAN
WARNING—TO AVOID INJURY, DISCONNECT UNIT POWER PRIOR TO SERVICING
A. FAN MOTOR
1. Remove rear panel and cabinet left-side panel (when looking at the front of the unit).
2. Evaporator blower wheel —disconnect evaporator motor wires from run capacitor and
power module (L1/L2).
3. Remove the screws securing motor and inlet-ring to blower housing (all screws are
external and visible), and remove blower wheel-motor assembly. Remove the blower
wheel set screw and disassemble the blower wheel from the motor shaft and remove the
motor.
4. Install the new components, reversing the removal procedure.
B. ELECTRONIC CONTROLLER (THERMOSTAT)
To replace cooling thermostat, remove left side panel to access controller assembly. Using
a 5/16” nut driver, remove (2) nuts on threaded studs, unplug the display cable, and lift up
to remove the controller. Plug display cable in the new controller, and secure in place.
C. POWER MODULE
To remove the power module, remove the rear control box cover. Disconnect wires (one at
a time), and re-attach each wire, while holding replacement module in other hand. Once
all wires have been reconnected in accordance with the wiring diagram, install new
power module.
D. CONDENSATE PUMP
1. Remove condensate pump access panel.
2. Remove brackets securing condensate pump in base
pan.
3. Disconnect pump wire leads at Molex connectors.
Remove retainer clamp and tubing.
4. Replace pump, install by reversing procedure.
E. HIGH PRESSURE SAFETY SWITCH
1. Remove cabinet rear panel.
2. Remove flare nut that secures capillary to the refrigeration system high pressure side.
A schrader valve is located in the discharge port which allows removal without losing
the refrigerant charge.
3. Remove two screws that secure high pressure switch.
4. Disconnect wire leads from power module and condensate pump safety switch.
5. Install new High Pressure Switch, and splice in new wire leads with existing control
wires. Then reverse in order to complete procedure.
To gain access to compressor and compressor run capacitor, remove left hand side panel.
16

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 and reset. Check external power supply making sure that the
disconnect is ON. Check for blown fuses or tripped circuit breakers. Reset or replace
(as 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 time delay for the compressor
CAUSE: Thermostat—Loose display cable
REMEDY: Examine the thermostat for a loose cable connection. Re-seat the display
cable from thermostat to power module.
CAUSE: Condensate Alarm—”CON” is displayed.
REMEDY: 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/turned off condenser
water supply.
REMEDY: Verify condenser water supply. Check High Pressure Cut-Out Switch.
Press Reset (RED Button in recessed cubby). Re-start unit.
CAUSE: Low Voltage —“LAC” is displayed. Check power supply for voltage outside
the range of 187-253 volts.
REMEDY: Have power checked by electrician and repaired.
CAUSE: Compressor relay failure...fan relay failure
REMEDY: Replace power module.
17

18
PREVENTIVE MAINTENANCE
OWC2412QC is designed to last a long time and to give maximum performance and reliability
with minimum maintenance. To prolong the life of the unit, regular maintenance must be
performed as specified below:
OFF SEASON STORAGE—WINTERIZATION
Before placing the unit into storage for the off-season, it is recommended to thoroughly clean
the unit, and remove all water in the CONDENSER COIL, WATER LINES, DRAIN PAN and CON-
DENSATE PUMP to avoid damage to the unit from freezing water or
contamination.
DRAINING THE CONDENSER COIL, AND INTERIOR WATER LINES
To drain the condenser coil, detach the WATER IN and WATER OUT lines. Using a Shop-Vac
or similar devise, vacuum the WATER OUT line and start the unit. The water valve will open,
allowing you to vacuum the water out of the condenser coil. Eventually, the High Pressure
Cut-Out will shut down the compressor. Wait 15 minutes, depress the HI PRESSURE RESET
and repeat this process until ALL of the water is out of the system. When completed, depress
the HIGH PRESSURE RESET one final time to make sure that it is reset.
DRAINING THE HOSE KIT
To drain the hose kit, disconnect all hoses, and allow the hoses to gravity drain.
EVACUATING THE CONDENSATE PUMP
Using a Shop-Vac or similar device, vacuum all water out of the condensate pump reservoir.
Condensate pumps come standard on all OWC models. When servicing pump, follow these
steps:
1. Make certain that the unit is disconnected from the power source before attempting to
service or remove any component.
2. Be sure the floats move freely. Clean as necessary.
3. Remove the pump assembly and check for obstructions. Clean as needed.
4. Clean the reservoir with warm water and mild soap when mineral deposits are visible.
5. Check the inlet and outlet piping. Clean as necessary. Be sure there are no kinks in the
lines that would inhibit flow.
CLEANING THE UNIT
Wash all coils and filters and allow the unit to dry completely.
BLOWER MOTOR
The evaporator motor on all units have permanently lubricated bearings. No oiling is
Necessary.
FILTER
A clogged filter will cause the unit to operate at greatly reduced efficiencies. We recommend
that the filter be inspected on a regular basis (every six weeks or less) depending on the
environment. The evaporator filter is located behind the return air grille and can be easily
removed and cleaned. The filter must be washed periodically as needed by placing it in a
dishwasher or soaking in a solution of warm water and detergent for 10 minutes. Then
rinsing clean with hot water and shaking excess moisture from filter.
GENERAL
Oceanaire products are NOT approved for outdoor use. Therefore, off-season storage should
be indoor, protected from weather conditions.
When necessary maintenance steps outlined above are followed, the air conditioner will provide long and
reliable service. The refrigeration and electrical circuits of the system should only be serviced by a fully
qualified service technician.