GIA Giatsu GIA-MAB-O-05Y01 Service manual

OWNER’S AND INSTALLATION
MANUAL
SPECIAL
ENGLSIH
MARINE T YPE AIR CONDITIONER
GIA-MAB-O-05Y01 | GIA-MAB-O-09Y01
GIA-MAB-O-12Y01 | GIA-MAB-O-16Y01
Thanks for choossing our product.
Please, read carefully this manual
before using the product

Contents
1.Introduction.................................................................................................1
2.Overview.....................................................................................................2
3.Installation ..................................................................................................3
3.1 Unpacking and Inspection .................................................................................................. 3
3.2 Safety Considerations ........................................................................................................ 3
3.3 The size of Sealed room ................................................................................................... 4
3.4 Placement of System .......................................................................................................... 4
3.5 The water inlet/outlet pipe .................................................................................................. 6
3.6 Condensate Drains ............................................................................................................. 7
3.7 Blower Assembly................................................................................................................. 7
3.8 Mounting Brackets .............................................................................................................. 7
3.9 Supply & Return Air Grilles and Transition Boxes............................................................... 7
3.10 Ducting.............................................................................................................................. 8
3.11 Seawater Pump and Plumbing.......................................................................................... 8
3.12 Electrical Connections, Grounding and Bonding ........................................................... 10
3.13 Manual Controller Installation ......................................................................................... 11
3.14 Electric Box Installation................................................................................................... 12
3.15 Installation Checklist (Review Prior To Installation) ....................................................... 12
3.16 Wiring Diagrams ............................................................................................................. 13
4.Operation..................................................................................................14
4.1 Manual Controller Operation............................................................................................. 14
4.2 Power ON/OFF ................................................................................................................. 15
4.3 FAN Control ...................................................................................................................... 15
4.4 Temperature Setting.......................................................................................................... 15
4.5 Mode Setting..................................................................................................................... 16
4.6 Display Fahrenheit or Centigrade ..................................................................................... 16
4.7 Error Codes....................................................................................................................... 16
4.8 Key Lock ........................................................................................................................... 17

4.9 Starting Interval Setting..................................................................................................... 17
4.10 Auto –off function of the manual controller .................................................................... 17
5.Accessories ..............................................................................................18
5.1 Remote Controller Operation ............................................................................................ 18
5.2 Button / Function and Description (Cover Closed)............................................................ 19
5.3 Button / Function and Description (Cover Open) .............................................................. 20
5.4 COOL Mode Operation ..................................................................................................... 20
5.5 HEAT Mode Operation...................................................................................................... 20
5.6 DEHUMIDIFY Mode Operation......................................................................................... 20
5.7 FAN Mode Operation Procedure....................................................................................... 20
5.8 Battery Replacement in Remote Controller ...................................................................... 21
6.Troubleshooting........................................................................................22
7.Maintenance.............................................................................................24
7.1 Reversing Valves ............................................................................................................ 24
7.2 Seawater Strainer ............................................................................................................ 24
7.3 Blowers ............................................................................................................................ 24
7.4 Condenser Coil Cleaning .................................................................................................. 24
7.5 Return Air Filters .............................................................................................................. 24
7.6 Winterization ..................................................................................................................... 24

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1.Introduction
Thank you for your purchase. No matter which of the following features was the reason for your
purchase, we are sure it will meet your needs and give many years of efcient and trouble free
use. Those marine air conditioners are designed for marine applications incorporating the following
features:
◆Compact design
◆High efciency rotary compressors (5-16K)
◆Cupronickel condenser coil
◆Raised lance n designed evaporator coil
◆Polyester coated 2” (50mm) deep drain pan with two condensate drain locations
◆Anti-vibration base pan
◆Pre-charged and pre-wired systems for easy connections
◆3-speed fan motor. This eliminates all harmonic sounds and rumbles.
◆Rotatable blower assembly
The controller offers the most technologically advanced design specically made for the unique
requirements of marine air conditioning. The controller has been designed with the following "user
friendly" features:
◆Non-volatile memory
◆Low voltage display panel
◆LED cabin temperature displayed in Fahrenheit or Celsius
◆Multiple fan speed selections
◆Compressor pressure fail safe protection
◆Moisture mode cycle for humidity control
This manual is intended to provide the information necessary to ensure proper installation,
operation, and maintenance of the unit. Improper installation can result in unsatisfactory
performance and/or premature failure of these units. Before proceeding, please read this manual
completely. In the interest of product improvement, specications and design are subject to change
without prior notice.
This appliance is not intended for use by persons (including children) with reduced physical,
sensory or mental capabilities, or lack of experience and knowledge, unless they have been given
supervision or instruction concerning use of the appliance by a person responsible for their safety.
Children should be supervised to ensure that they do not play with the appliance.
This product must not be disposed together with the domestic waste. This product
has to be disposed at an authorized place for recycling of electrical and electronic
appliances.

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2.Overview
MANUAL CONTROLLER
ELECTRIC BOX
ROTARY COMPRESSOR
BASE/DRAIN PAN
HANDLE
FILTER
ROTATABLE BLOWER
EVAPORATOR
DRAINAGE
REVERSE VALVE
CONDENSER COIL
HOW IT WORKS
Your self-contained air conditioner consists of four main components and a refrigerant gas
circulating through the system. The BLOWER draws warm cabin air across the fins on the
EVAPORATOR where the heat from the air is transferred to the refrigerant in the evaporator
coil. As the refrigerant evaporated from a liquid into a gas, it absorbs the heat from the cabin air.
The COMPRESSOR then compresses the refrigerant gas and pumps it through the outer tube
in the CONDENSER COIL. The seawater pump circulates cool seawater through the inner tube
in the condenser coil; this cools the refrigerant and condenses it into a liquid. The heat from the
refrigerant is exchanged to the seawater and discharged overboard. The liquid refrigerant is then
passed through the EVAPORATOR COIL and the cycle repeats; removing heat from the cabin air
lowering its temperature. The cooled air is blown through the ducting and out the supply air grille(s).
For reverse cycle heating, the refrigerant flows in the opposite direction through the reversing
valve. Heat is transferred from the seawater in the condenser coil to the refrigerant and then to the
air blowing through the evaporator into the cabin. Seawater temperature will directly affect the a/
c 's efciency. This a/c can effectively cool your boat in water temperatures up to 90°F and heat in
water temperatures as low as 40°F.
A
C
B
H
I

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A
C
B
G
H
Model A B C D E F G H
GIA-MAB-O-05Y01 309 324 440 91.5
16 40
40 80
GIA-MAB-O-09Y01 411 324 457 45 102
GIA-MAB-O-12Y01 409 370 458 119.4 35 107
GIA-MAB-O-16Y01 478 365 488 40 102
3.Installation
3.1 Unpacking and Inspection
When the equipment is received, all items should be carefully checked according to the packing
list to ensure all cartons have been received. Move units in the normal "up" orientation as indicated
by the arrows on each carton. Examine cartons for shipping damage, removing the units from the
cartons if necessary. If the unit is damaged, the carrier should make the proper notation on the
delivery receipt acknowledging the damage.
3.2 Safety Considerations
VERY IMPORTANT: Never install your air conditioner in the bilge or engine room areas. Ensure
that the selected location is sealed from direct access to bilge and/or engine room vapors. Do
not terminate condensate drain line within 3’ (914mm) of any outlet of engine, generator exhaust
system, compartment housing an engine or generator, or in a bilge, unless the drain is connected
properly to a sealed condensate or shower sump pump. Seal all cabin sole penetrations around
condensate hoses to eliminate harmful bilge fumes in the cabin living spaces.
Installation and servicing of this system can be hazardous due to system pressure and
electrical components. When working on this equipment, always observe precautions described
in the literature, tags and labels attached to the unit. Follow all safety precautions. Wear safety
glasses and work gloves and place a re extinguisher close to the work area. The following is a
summary of the labels on the unit:

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DANGER:Electrical shock hazard. Disconnect voltage at main panel or power source
before opening any cover. Failure to comply may result in injury or death.
WARNING:This component does not meet federal requirements for ignition protection.
Do not install in spaces containing gasoline engines, tanks, LPG/CPG cylinders, regulators, valves
or fuel line ttings. Failure to comply may result in injury or death.
Notice:This component is charged with Hydrochlorofluorocarbon
(Hydrofluorocarbon) refrigerant R22(R410A). Effective July 1, 1992, it shall be unlawful for any
person to knowingly vent or otherwise knowingly release any class 1 (CFC) or class 2 (H CFC)
substance as a refrigerant in a manner which permits such substance to enter the atmosphere per
the clean air act of 1990. Public law 101-549 title IV section 608-c. Failure to comply may result in
severe penalties, including nes and imprisonment.
CAUTION:To minimize the hazard of electrical shock and personal injury, this
component must be effectively grounded. Refer to the installation guidelines for further information.
Caution! High compressor temperature is normal. Do not touch!
3.3 The size of Sealed room
The size of sealed room should not be too small,otherwise it will affect the unit normal running.
See diagram below.
3.4 Placement of System
Selecting a good location for your air conditioner is the most important part of your preparation.
Be sure to consider the size of the area you are cooling, the air distribution needs,and the size
of the unit you have chosen. Keeping in mind that cool air has a tendency to fall; it is highly
recommended that you locate the supply air grille as high as possible in the cabin. Don’t leave the
exible ducting too long,otherwise it will lower the efciency of the unit. See diagram below.

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The unit should be installed as low as possible, BUT NEVER IN THE BILGE OR ENGINE
ROOM AREAS, ENSURE THAT THE SELECTED LOCATION IS SEALED FROM DIRECT
ACCESS TO BILGE AND/OR ENGINE ROOM VAPORS. Installing the unit as low as possible
(such as under a V-berth, dinette seat or bottom of a locker) and ducting the supply air as high as
possible, creates an ideal airow condition. This type of installation will prevent short or premature
cycling. Tools required:
◆Screws drivers
◆Pliers
◆Pipe wrench
◆Wire cutters/crimpers
◆Drill & 7/8" bit
◆Jigsaw
◆Duct tape
◆Electrical tape
◆Teon tape
◆Bedding compound to seal thru hull
ttings
◆Hardware to secure unit, pump,
strainer, grilles & control panel
The unit should be positioned on a rm, level,
horizontal surface and the condensate drain line
should run downward from the unit to a suitable
drain location. Plan all Connections, which must
be made including ducting, condensate drain, and
seawater in and out, electrical power connections,
location of control, and seawater pump placement,
to assure easy access for routing and servicing.

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3.5 The water inlet/outlet pipe
Follow the steps below to connect the water inlet/outlet hose with the double-tube heat
exchanger of units
(1). Remove screws on the outer casing.
(2). Remove the outer casing of the unit, and then connect the water inlet/outlet hose with the
double-tube heat exchanger.
(3). Reinstall the outer casing and fasten screws.

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3.6 Condensate Drains
The condensate drain pan is 2” (50mm) high with two drain locations. During conditions of high
humidity, condensate may be produced at a rate of approximately 1/2 gallon per hour (1.9 liters per
hour). Please pay more attention, it is important to route condensate drains downward to a sump
pump. It is not recommended to route condensate drains to the bilge. After the condensate drain
installation is complete, test the installation by pouring water into the pan and checking for good
ow.
For installation of the condensate drain:
◆Attach a 5/8” I.D. reinforced hose to the hose barb and secure with stainless steel hose
clamps.
◆Install the condensate drain hose downhill from the unit and aft to a sump.
◆Two drain fittings may be used and the hoses (teed) together using a tee fitting provided
there is a minimum 2" drop from the bottom of the base pan to the tee connection.
Do not terminate condensate drain line within three 3’ (914mm) of any
outlet of engine, generator exhaust systems, compartment housing an engine or generator,
nor in a bilge, unless the drain is connected properly to a sealed condensate or shower
sump pump. Seal all condensate hose penetrations.
3.7 Blower Assembly
You can achieve multi-directional supply air discharge from a single unit by rotating the blower
to the desired position. It is ideal for tight installations as 180° of rotation is available with which
to position the blower. Its advanced design allows the blower to be easily removed for rotating or
servicing by removing 4 screws. Rotate the blower to allow the most direct ow of air to the supply
air grille.
3.8 Mounting Brackets
The a/c unit is supplied with a base pan that also
serves as a condensate pan. Mounting clip brackets (4)
are provided to secure the base pan to a at, horizontal
surface.
3.9 Supply & Return Air Grilles and
Transition Boxes
Install the supply air grille as high as possible
in a location that will provide uniform air distribution
throughout the cabin. Grille louvers should be directed
upward. The return air grille should be installed as low and close to the a/c as possible to insure
direct uninterrupted airflow to the evaporator. The return air grille should have a minimum four
inches (4') of clearance in front of it, free from any furniture or other obstructions. In no instance
should a supply air discharge be directed towards a return air grille, as this will cause the system
to short cycle. Allow for adequate clearance behind the supply air grille(s) for the transition box
and ducting connection. See the Maintenance section of this manual for return air lter cleaning

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instructions.
Model 5K(7K) 9K 12K 16K
Min. Return Air Grilles Size (re.) 48500mm265680mm276514mm2103584mm2
3.10 Ducting
Good airow is critical for the performance of the entire system. The static pressure should not
exceed 100 Pa.It is highly dependent on the quality of the ducting installation. The ducting should
be run as straight, smooth and taut as possible minimizing the number of 90 degree bends (two
tight 90° bends can reduce airow by 25%). If a transition box is used, the total area of supply air
ducts going out of the box should at least equal the area of the supply duct feeding the box. To
calculate the square inch area of a round duct, multiply the radius by itself (r2) and multiply that
number by 3.1416(π). The following is a summary of proper ducting connections:
(4). Pull back the berglass insulation exposing the inner Mylar duct hose.
(5). Slide the Mylar duct hose around the mount ring until it bottoms out.
(6). Screw 3 or 4 stainless steel sheet metal screws through the duct hose into the transition
ring. Make sure to catch the wire in the duct hose with the heads of the screws. Use nish
washers with the screws if necessary. Do not use band clamps, as the hose will slide off.
(7). Wrap duct tape around the ducting and ring joint to prevent any air leaks.
(8). Pull the insulation back up over the Mylar to the ring and tape this joint.
(9). Remove excess ducting and use the same connection method at the supply air grille.
(10). All ducting should:
◆Be appropriately sized for each application.
◆Run as smoothly and taut as possible.
◆Have as few bends or loops as possible.
◆Be securely fastened to prevent sagging or chang during vessel operation.
◆Have all excess ducting lengths trimmed off.
◆Not be attened or kinked.
◆Insulated when located in high heat load areas (hull side, mechanical compartments, etc.).
◆Be properly protected against potential damage when routed through open areas or
bulkheads.
3.11 Seawater Pump and Plumbing
Several guidelines should be followed during the installation of the seawater system. Since
the circulation pump is centrifugal and not self-priming, it must be mounted so that it is always at
least 1’ (305mm) below the water line regardless of which tack the vessel is on. Pump may be
mounted horizontally or vertically, however, the discharge must always be above the inlet. Pump
head should be rotated toward the direction of water ow. Install the seawater speed scoop intake
as far below the water line and as close to the keel as possible in any application, but especially
on a sailboat, to keep the intake in the water when the boat heels over so that air does not get into
the system. The speed scoop intake must face forward and not be shared with any other pump. A
seawater strainer is mandatory between the shut off valve (seacock) and the pump to protect the

Marine Air Conditioner Installation & Operation Manual
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pump from any foreign matter. Failure to install a seawater strainer will void the pump warranty.
The seawater system should be installed with an upward incline from the speed scoop & seacock,
through the strainer, to the inlet of the pump, next to the inlet of the a/c unit's condenser coil. The
discharge from the a/c unit should run to the seawater outlet thru-hull tting that should be located
where it can be visually inspected for water ow as close to the waterline to reduce noise. All hose
connections shall be secured using double/reversed stainless steel hose clamps. Use Teon tape
on all threaded connections.
Summary of the seawater system installation:
(1). Install the speed scoop thru-hull inlet as close to the keel and as far below the water line as
possible, facing forward. Bed the scoop with a marine sealant designed for underwater use.
(2). Install a bronze, full ow seacock on the speed scoop thru-hull inlet.
(3). Install a seawater strainer below the level of the pump with access to lter.
(4). Mount the pump above the strainer and at least 1’ (305mm) below the waterline.
(5). Connect the seacock and strainer with an uphill run of 5/8" reinforced marine grade hose.
(6). Connect the discharge from the pump uphill to the bottom inlet of the a/c unit's condenser
coil with 5/8" hose. Connect the discharge from the condenser coil to the overboard
discharge thru-hull tting with 5/8" hose.
(7). Avoid loops, high spots or the use of 90° elbows with seawater hose (each 90° elbow is
equivalent to 2.5' (762mm) of hose and a 90° elbow on the pump outlet is equivalent to 20'
(6.1m) of hose).
(8). Double clamp all hose connections with stainless steel clamps, reversing the clamps.
(9). Use Teon tape on all threaded connections.
(10). Connect all metallic parts in contact with seawater to the vessel's bonding system
including the speed scoop inlet, strainer, pump and the air conditioner. Failure to do so will
void warranty.
Seawater Flow:
Model 5K(7K) 9K 12K 16K
Min. Seawater Flow 4.0L/min 6.0L/min 10.5L/min 11.0L/min
Max. Seawater Flow 10.0L/min 15.0L/min 20.0L/min 25.0L/min
Rated Seawater Flow 6.0L/min 9.0L/min 14.0L/min 16.0L/min

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3.12 Electrical Connections, Grounding and Bonding
All a/c units have a terminal strip mounted inside the electric box. The terminal strip is labeled
for proper connections of the electrical supply, ground wires and pump circuits. A wiring diagram
is provided in the electrical box and later in this manual. The wiring diagram in the electrical box
supersedes any found in this manual and ABYC standards. The correct size circuit breaker should
be used to protect the system as specied on the a/c unit's data plate label. A minimum of 12 AWG
boat cable should be used to supply power to the a/c unit and the seawater pump. All connections
shall be made with ring or fork terminals. Turn off a/c power supply circuit breaker before
opening electric box.
Each a/c installed requires its own dedicated circuit breaker. If there is only one a/c installed,
the seawater pump does not require a circuit breaker; the wiring from the seawater pump is
connected to the terminal strip in the electric box. If two or more a/c use the same seawater pump,
the pump wires will be connected to a pump relay, Please refer to the wiring diagram. Electrical
connections in the bilge and/or below the waterline should use heat shrink type butt splices. Field
wiring must comply with ABYC electrical codes. Power to the unit must be within the operating
voltage range indicated on the data plate. Properly sized fuses or HACR circuit breakers must be
installed for circuit protection. See data plate for maximum fuse/circuit breaker size (MFS) and
minimum circuit amperage (MCA). All units must be effectively grounded to minimize the hazard
of electrical shock and personal injury. The following can be observed: AC (alternating current)
grounding (green wire) must be provided with the AC power conductors and connected to the
ground terminal (marked "GRND") at the AC power input terminal block of the unit(s), per ABYC

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standard E-8, or equivalent.
(1). Connections between the vessel's AC system grounding conductor (green wire) and the
vessel’s DC (Direct Current) negative or bonding system should be made as part of the
vessel's wiring, per ABYC standard E-9, or equivalent.
(2). When servicing or replacing existing equipment that contains a chassis-mounted ground
stud, the installer must check the vessel's wiring for the existence of the connection
required in item 1 above.
•
The a/c unit must be connected to the ship’s bonding system to prevent
corrosion due to stray electrical current or voltage. All pumps, metallic valves and ttings in the
seawater circuit that are isolated from the a/c unit by PVC or rubber hoses must be individually
bonded to the vessels bonding system also. This will help eliminate any possibility of corrosion due
to stray current or voltage.
MODE
FAN
H
AUTO
L
M
AUTO

(3). PHASE NOTICE
It is extremely important to ensure that wiring and phase
sequencing of a three-phase power source is correct. Marine
wiring standards call for power source phases L1, L2, and L3
to be color-coded BLACK, WHITE, and RED, respectively.
These must be connected to the unit with the proper
sequence; otherwise, it will not operate properly. If the wiring
sequence is incorrect, the unit's compressor (Scroll type only)
and pump (if applicable) will run in the reverse direction at a
signicantly increased noise level.
3.13 Manual Controller Installation
DO NOT turn the unit off and immediately
turn it back on. Wait at least 30 seconds for refrigerant
pressures to stabilize.
Before mounting the manual controller, consider the
location. The manual controller should be mounted on an
inside wall, slightly higher than mid-height of the cabin. The cut out size for the manual controller
is 2 1/2” (64mm) wide by 3 5/16” (84mm). Do not mount the manual controller in direct sunlight,
near any heat producing appliances or in a bulkhead where temperatures radiating from behind
the panel may affect performance. Do not mount the manual controller in the supply air stream.
Do not mount the manual controller above or below a supply or return air grille. Do not mount the
manual controller behind a door, in a corner, under a stairwell or any place where there is no freely
circulating air. Mount the manual controller within display cable length (custom lengths available) of
the air conditioner. Plug the display cable into the circuit board in the electric box and into the back
of the manual controller.

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3.14 Electric Box Installation
Mount the electric box using four M5 screws.
Mount the electric box in a cool dry location and leave plenty of room for maintenance.
3.15 Installation Checklist (Review Prior To Installation)
3.15.1 Seawater cooling system:
◆Speed scoop located as far below the water line and as close to the keel as possible
◆Shut off valve (sea cock) and speed scoop properly sealed and tightened
◆Seawater pump is at least 1’ (305mm) below water line and securely mounted
◆Strainer mounted below pump with access to lter
◆Double/reversed stainless steel hose clamps on all hose connections
◆Teon tape on all threaded connections
◆Hose runs uphill from speed scoop and sea cock to strainer, pump and a/c unit, then downhill
(if possible) from a/c unit to overboard discharge
◆Water owing freely from overboard discharge while pump is running
◆Pump relay panel, if used, must have its own circuit breaker sized for the pump (20 amp max)
◆All metal ttings should be bonded
3.15.2 Mounting
◆Not in engine room or bilge area, must be sealed away from exhaust or fumes
◆Proper spacing allowed around unit
◆Attached to solid level platform with hold down brackets provided
◆Condensate drain routed aft and down hill to a sealed sump (not bilge)
◆All penetrations to bilge area sealed
◆Blower rotated toward supply air grille
3.15.3 Electrical
◆All butt connections on pumps are tightly crimped and covered with heat shrink

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◆AC power source installed and grounded/bonded in accordance with ABYC standards
◆Control wires connected to terminal strip with fork or ring terminals
◆Circuit breakers sized according to specications on the data plate label
◆Pump Relay Panel (if used) has a dedicated circuit breaker sized for the pump but not to
exceed 20 amps maximum.
3.15.4 Grilles and Ducting
◆Supply air grille mounted as high as possible
◆Return air grille mounted as low and as close to the a/c unit as possible
◆Return air grille mounted away from bilge vapors or exhaust fumes
◆Ducting is pulled taut, straight, smooth and properly connected with no excess
3.15.5 Quick Start Operations Checklist
◆Ensure seawater intake ball valve (sea cock) is open.
◆Turn on the a/c circuit breaker. If the seawater pump has its own circuit breaker, make sure to
turn it on.
◆Turn the system on. Set the desired cabin temperature (set point).
◆Check for a steady solid stream of water from the overboard discharge.
◆Verify that there is steady airow out of the supply air grille
◆If the unit does not appear to be operating properly, refer to troubleshooting guidelines.
Note: Do not turn the unit off and immediately turn it back on. Allow at least 30 seconds for
refrigerant pressure equalization.
3.16 Wiring Diagrams
WIRING DIAGRAM GIA-MAB-O-05Y01, GIA-MAB-O-09Y01 The
specification of power cord is AWG14*3(3*1.5)

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WIRING DIAGRAM GIA-MAB-O-12Y01, GIA-MAB-O-16Y01 The
specification of power cord is AWG12*3(3*2.5)
The diagram of power supply is below.
Power Supply:
4.Operation
4.1 Manual Controller Operation
CAUTION:
◆Don't install the manual controller in a location where it can get wet.
◆Don’t knock, throw or open the manual controller frequently.

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12 3 4
56789
1. Remote receiver 6. Fan control button
2. Digital display 7. Temp. Setting button (Increasing)
3. Fan speed display (HIGH-MID-LOW and AUTO speed) 8. Temp. Setting button (Decreasing)
4. Display of mode operation (COOL-DEHUMIDIFY-HEAT and
AUTO) 9. ON/OFF button
5. Mode button
This manual controller has memory function, if power off happened during the operation, the
controller will memorize the status of ON/OFF, operation mode, set temperature, operation fan
speed, temperature display format and time of starting interval. After powered on, the manual
controller will display the setting status before power off automatically; and if the operation status
before power off is on, the fan runs at once, after 1 minute, the compressor shall automatically run
in the operation status before power off. (The units has not been set up the time of starting interval)
In cooling/heating/dehumidify mode, the pump starts before the
compressor starts, stops after 5 seconds delay of the compressor stopping
4.2 Power ON/OFF
◆Press ON/OFF button to turn the unit on
◆Pressing the ON/OFF button a second time will turn the unit off
4.3 FAN Control
◆Press the FAN button, the fan speed will change in the following order:
◆In “DEHUMIDIFY” mode, the fan will work at low speed automatically
4.4 Temperature Setting
◆Press temperature setting key
▲To increase in 1o increments
▼ To decrease in 1o increments

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◆The setting range of temperature in each mode:
COOL 61°F 86°F or 16°C 30°C
DEHUMIDIFY 61°F 86°F or 16°C 30°C
HEAT 61°F 86°F or 16°C 30°C
FAN In this mode, temperature cannot be changed.
AUTO In this mode, temperature cannot be changed.
4.5 Mode Setting
◆Press this key to change the operation mode in order of
In “COOL” mode, the LED marked will be light if the set temperature is lower than room
temperature. If set temperature is higher than room temperature, only the fan will run.
◆In “DEHUMIDIFY” mode, the LED marked will be light and fan will work at low speed
within a certain temperature range. Dehumidifying is more efcient than in cooling mode and
it will save energy.
◆In “FAN” mode, the room temperature will be displayed and the temperature cannot be set.
◆In “HEAT” mode, the LED marked will be light when the set temperature is higher than
the room temperature. When the setting temperature is lower than the room temperature, it
will not run.
◆In “AUTO” mode, the LED marked AUTO will be light and the room temperature will be
displayed. The temperature cannot be set, as the system will run automatically in the
appropriate mode according to the contrast between room temperature and set temperature.
COOLING ONLY TYPE WITHOUT HEAT MODE.
4.6 Display Fahrenheit or Centigrade
Pressing the ▲ and ▼ key simultaneously, will switch between Fahrenheit and Centigrade
modes.
4.7 Error Codes
When there are faults within the system, an error code will be displayed on the display
controller: Power off the unit and contact professional service.
Error code Description
E1 Compressor high pressure protection
E2 Evaporator freezing protection
E3 Compressor low pressure protection
E6 Communication error
F0 Ambient temperature sensor error
F1 Evaporator temperature sensor error

Marine Air Conditioner Installation & Operation Manual
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4.8 Key Lock
◆Press ▼and FAN key simultaneously, all keys are locked. Press ▼and FAN key
simultaneously again, to unlock the keys.
◆When keys are locked, the controller is locked out of system operation. “EE” will be displayed.
4.9 Starting Interval Setting
◆If there are several A/C units in a yacht, you can set starting time interval between one by
one.
◆When the manual controller power on, and
there isn’t any operation, to press the ▲ button
and fan speed button simultaneously, the
starting interval can be set, the nixie tube will
flash a number in every 0.5s, then pressing
▼ and ▲ buttons to set up, after the setting,
to press the ▲ button and fan speed button
simultaneously, to confirm the set up value;
if not to press▲ button and fan button again
simultaneously, the gure will ash 10s,and then the controller will quit from starting interval
setting, the setting number is not available.
◆The value be displayed by nixie tube is the gure of interval time, each interval time is 20s,
for example the set up value is 128, it means that the actual setting interval time should be
128×20=2560s.
◆When the value be displayed by ashing nixie tube, then to shield each signal of wireless
remote controller, excepting to press the ▲ button and fan speed button at the same time,
and to shield other buttons.
◆After manual controller powered on, if there is wireless remote controller or at the same time
to press other buttons except the ▲ button and fan speed button simultaneously, and then
press the ▲ button and fan speed button simultaneously, it will display the gure of interval
time for 5s. During the period, if there is wireless remote controller or other remote controller
signal, it will directly quit the display interface of starting interval time.
◆The new setting starting interval time would be executed after manual controller re-powered
on.
◆The setting range of starting interval value is 0-255; accordingly, the setting range of starting
interval time is 0-5100s(85min).
◆If there is malfunction happened, cannot set up or display the time of starting interval.
4.10 Auto –off function of the manual controller
The display of ambient temperature will automatically blank in 5-minute lag if there is no
operation on the manual controller.
(1). After receiving the signal from the manual controller, the indicator will light on automatically,
in which case, the unit will not operation at all and the manual controller can be active after