Airxcel 46516 SERIES Troubleshooting guide

RV Products Division
OPERATION AND MAINTENANCE
INSTRUCTIONS FOR
46516 SERIES
TWO TON PACKAGED HEAT PUMP
Airxcel, Inc.
RV Products Division
P.O. Box 4020
Wichita, KS 67204
1976-554 (2-10) PP

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TABLE OF CONTENTS
I. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
II. General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
III. Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
IV. Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
I. SPECIFICATIONS

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II. GENERAL INFORMATION
This packaged heat pump mounts below the floor of the
vehicle. The innovative design makes it possible to maintain a
smooth, free-flowing roof line for the vehicle. It also relocates
all heat pump noise and condensate drainage off the roof to
below the floor of the vehicle.
This heat pump contains a dual compressor system with each
compressor connected to a separate refrigeration circuit. It
combines the capacity of two roof mounted units into one
highly efficient and compact package.
A. Air Conditioner
This heat pump operates a two-stage system in cooling
running a single compressor when the air conditioning
requirement is low, or with two compressors when maximum
cooling is required.
The first compressor and refrigeration circuit is referred to as
“1st Stage”. The second compressor and refrigeration circuit
is referred to as “2nd Stage”. First and second stage will
operate as indicated below:
1st stage (the first compressor and refrigeration circuit) will
operate when:
1) The thermostat is demanding cooling,
2) The vehicle is being powered by either shore
line or the on-board generator.
2nd stage (the second compressor and refrigeration circuit)
will operate when:
1) The thermostat senses room temperature is
2 degrees higher than setpoint,
2) The vehicle has enough power.
B. Heat Pump
Heat operation always energizes both refrigeration circuits
with a 30 second delay between compressor 1 start-up and
compressor 2 start-up, however; only refrigeration circuit #1
operates if power is not available for circuit #2.
Thermostat operation is described in the operation instructions
packed with the thermostat.
The 46516 series air conditioner uses R410A refrigerant with
a factory installed High Pressure Safety Circuit. In the event
of an abnormal condition (failure of fan motor, dirty
condenser coil, dirty filters) the high pressure switch will
prevent the compressor from continuing to run. Once the high
pressure switch has tripped, this safety circuit will “Lock Out”
the compressor from trying to restart or run. This is a manual
reset pressure switch; access shall be limited to Qualified
Technicians. The pressure switch manual reset button is
accessed in the unit’s bottom access panel and are located on
each compressor assembly. The high voltage power must be
turned off before opening panel and resetting switch.

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FIGURE 1

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III. MAINTENANCE
One of the biggest advantages of owning a Coleman-Mach
heat pump is that the maintenance needed to keep the unit in
good care is minimal.
In fact, the only maintenance that must be taken care of on a
regular basis is the cleaning or replacement of the units return
air filters.
The manufacturer of your vehicle determines the number, size
and location of the return air filters. Be sure to contact your
dealer should you have any questions concerning the number
of filters used and their location.
The return air filters of this system will accumulate dust and
dirt more quickly than ceiling mounted systems. We
recommend that the filters be checked on a weekly basis.
If the filters are not cleaned or replaced at regular intervals,
they may become partially clogged with lint and dirt. A
clogged filter will produce a loss of air volume and may
eventually cause equipment damage.
Do not operate the heat pump without return air filters.
Operating the system without filters allows the lint and dirt
that is normally stopped by the filter to accumulate on the
cooling coil of the heat pump. This also will lead to a loss of
air volume, possible equipment damage and an expensive
cleaning process.
Periodically (once or twice a season), inspect the outdoor coil
and brush off any accumulated residue with a soft bristled
brush.
IV. WARRANTY
Let’s face it. Sometimes even the best products may need
service. To obtain warranty service on your Coleman-Mach
air conditioner, please contact your selling dealer, or you may
access our web site on the Internet at www.rvcomfort.com for
answers to the most frequently asked questions and service
center locations.
Airxcel, Inc. support help may be accessed by E-mail at
RVPSuppo[email protected]m.
All written correspondence should be directed to:
Airxcel, Inc.
RV Products Division
P.O. Box 4020
Wichita, KS 67204
IMPORTANT
1. Carefully read your limited two year product
warranty which is packed with the product.
2. An optional three year extended parts only contract
is available at an additional cost of $89.95. To obtain
this optional three year parts contract, fill out the
application card stapled to the front of this envelope.
Please mail the card and a check or money order to
the address above. Applications must be made
within ninety (90) days of the original purchase.
3. Inquiries about your Coleman-Mach air conditioner
must include the model and serial numbers and the
date of purchase. The model and serial numbers can
be found on the unit rating plate.