Tosot GRH15DC-A6NNA1A/I User manual

User Manual
RV AIR CONDITIONER
Before installing and using your TOSOT Air Conditioner,
please read this user manual in its entirety.
MO DEL NUMB ER
Ceiling Assembly Roof Top Unit
GRH15DC-A6NNA1A/I GRH15DC-A6NNA1A/O

Welcome to the TOSOT Direct Family!
We’re extremely happy to welcome you as a new member of our family! Please
read the tips below before using your product for the first time.
1. The RV air conditioner is a heavy object, which needs two or more people to lift
and install. Failure to do so could result in injury or other accidents.
2. Allow the unit to sit upright for at least 3-4 hours before powering on. Shipping
carriers may set the unit on its side, which causes the refrigerant to pool in
certain areas. Standing the unit upright for 3-4 hours allows the refrigerant to
move freely within the coils.
3. Run the unit continuously for 24 hours after installation. This allows the unit to
work out any “kinks” that may have resulted during shipping from our factory to
your doorstep.
4. Some parts with sharp edges may cause injury, so gloves are highly recommended
for unpacking and installing.
5. For a quick start video guide of installation, please contact Customer Support.
6. If you have any problems with your product, please send us an email before
submitting a return request, as there might be a simple solution for your issue.
Tips for First-Time Use

Table ofContents
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Safety and Instructions
Installation and Setup
Electrical Safety Warning
Refrigerant Information
Part List
Parts Description
Installation
Operation
Control Panel
Remote Control
Combination Buttons
Cleaning and Maintenance
01
01
02
03
04
06
07
18
18
20
25
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Replacing the Batteries 26
26
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Troubleshooting
Malfunction Codes
28
30
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Warranty & Customer Support 31
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Warranty Information
Customer Support
31
31

Safety and Instructions
01
Installation and Setup
Your safety and the safety of others are very important to us. Please read the
following safety precautions before use and installation. A digital version can be
obtained from customer support.
● Use the appliance only for its intended purpose as described in this manual.
● Do not use electric cords that have become frayed or otherwise damaged.
● This air conditioner must be properly installed in accordance with the Installation
instructions as described in this manual before it is used.
● Please turn off the unit and disconnect all power to the vehicle before cleaning
and servicing.
● When refrigerant leaks or requires discharge during installation, maintenance, or
disassembly, it should be handled by certified professionals or otherwise in
compliance with local laws and regulations.
● The appliance shall be stored in a room without continuously operating ignition
sources. (for example open flames, an operating gas appliance, or an operating
electric heater.)
● Compliance with national gas regulations shall be observed.
● Should repair be necessary, contact your nearest authorized Service Centre. Any
repairs carried out by unqualified personnel may be dangerous.
● Air conditioners covered in this manual are designed for installation on an RV’s roof.
● Installation of this air conditioner must be in accordance with NFPA 1192 and
NFPA 70.

02
Electrical Safety Warning
● All wiring must be complied with local and national electrical codes. All wiring
must be installed by qualified electricians. If you have any questions about the
instructions, contact a qualified electrician.
● Make sure the power supply is cut off you until finish installing the air conditioner.
Otherwise, it may cause an electric shock.
● Check the available power supply and resolve any wiring problems before
installing and operating this unit.
● This air conditioner is designed to operate from a 115V AC, 60Hz, 1 Phase
power supply.
● Air switch should include magnet buckle and heating buckle function to can
protect the circuit from short and overloading.
● An all-pole disconnection switch having a contact separation of at least 3mm in
all poles should be connected in the fixed wiring.
● Electrical wiring may be present between roof and ceiling. Be sure that power is
disconnected at the mains and battery.
FCC Information
However, there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to radio or television
reception, which can be determined by turning the equipment off and on, the user
is encouraged to try to correct the interference by one or more of the following
measures:
This device complies with part 15 of the FCC Rules. Operation is subject to the
condition that this device does not cause harmful interference.
Note:
This equipment has been tested and found to comply with the limits for a Class
B digital device, pursuant to part 15 of the FCC Rules. These limits are designed
to provide reasonable protection against harmful interference in a residential
installation. This equipment generates, uses and can radiate radio frequency
energy and, if not installed and used in accordance with the instructions, may
cause harmful interference to radio communications.

03
● Reorient or relocate the receiving antenna.
● Increase the separation between the equipment and receiver.
● Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
● Consult the dealer or an experienced radio/TV technician for help.
● This air conditioner utilizes fluoride R-32 refrigerant, which is a next-generation
refrigerant that efficiently carries heat and has a lower environmental impact than
other refrigerants.
● Compared to other common refrigerants, R32 is a nonpolluting refrigerant with no
harm to the ozone layer of the atmosphere. The influence of the greenhouse effect
is also lower. R32 has very good thermodynamic features which lead to high energy
efficiency. The units, therefore, need less filling and maintenance.
● The refrigerant is flammable and odorless. Furthermore, it can lead to explosions
under certain conditions. However, the flammability of the refrigerant is very low
and can only be ignited by fire.
● The appliance should be stored in a room without continuously operating ignition
sources, for example, open flames, an operating gas appliance, or an operating
electric heater.
● Ducts connected to an appliance should not contain an ignition source.
● Keep any required ventilation openings clear of obstructions.
● Do not pierce or burn the appliance or any of its components.
● Be aware that refrigerants may not contain an odor in the presence of a leak.
● Do not use means to accelerate the defrosting process or to clean, other than
those recommended by the manufacturer.
● Servicing shall be performed only as recommended by the manufacturer.
Appliance filled with flammable gas R32.
A2L
Refrigerant Information

04
Parts List
Fabric duct
PARTLOOKS LIKE QUANTITY
2
Before using the appliance, read the owner's manual first.
Before using the appliance, read the owner's manual first.
Before using the appliance, read the owner's manual first.
Recommended Operating Environment
● The recommended operating temperature range is 23°F-115°F (-5°C-46°C).
(Heating:23°F-75°F (-5°C-24°C ) /Cooling:64°F-115°F (18-46°C).
● The outdoor unit may stop operation due to various kinds of protection within the
working temperature range.
● Air inlet should be far away from obstacles and not have any objects near the air
outlet. Otherwise, it will affect the radiation of the heat-removal pipe.
● Please try your best to keep far away from fluorescent lamp.
● The appliance shall not be installed in laundry areas.
Tapping screw for
duct plate 8

05
Remote control holder
Double-sided tape
AAA battery
PARTLOOKS LIKE QUANTITY
1
1
2
Fixing screw for
remoter control holder 2
Remote control 1
Bolt for ceiling
assembly (7.5 inch)
Sponge (sealing strip)
Gasket
4
1
1
Screw cap 6
Duct plate 1 set
Bolt for ceiling
assembly (5.3 inch) 4
use in
indoor
(bottom)
use in
outdoor
(upper)

06
Parts Description
Ceiling Assembly
Roof Top Unit
Note:This is a universal introduction for a variety of models. The display
content may be different from the actual. Please refer to the actual unit.
1Air Outlet 2Filter Sub-assy
4Air Inlet 5Remote Control
3Control Panel
2
1
3
4
5
1Air Inlet
2Drainage Outlet
3Chassis
2
13

07
Installation
Warning
● The air conditioner has been designed for use in recreational vehicles.
● Be careful when testing the unit. Do not operate the unit with the exterior case
removed.
● Outdoor unit can't be installed at the low recess of the roof of the vehicle. It must
be mounted on the flat surface of the roof to make sure rain, car-washwater,
condensated water, etc. can be drained smoothly. No water is allowed to be
accumulated around the outdoor unit. Otherwise, it will cause malfunction or
safety hazards as the water will pour into the air conditioner.
● There must be 1.2 to 5.32 inches between the RV ceiling and roof.
Required Tools
1. Screwdriver
2. Electric Drill with 1/8” drill bit
3. Bubble Level
4. Pencil
5. Torque Wrench (0-60 in-lbs)
6. Ruler
7. Scissors