Mitsubishi Electric CAHV-P500YA-HPB Instruction Manual
Air-Cooled Heat Pump Unit CAHV
Instructions Manual
CONTENTS
Thoroughly read this manual prior to use.
Save this manual for future reference.
Some of the items in this manual may not apply to made-to-order units.
Safety Precautions................................................................... 2
1. External Appearance and Components ...............................
6
2. Operating the Unit................................................................
7
[1] Initial Operation.................................................................
7
[2] Daily Operation .................................................................
7
[3] Using the Unit in Sub-freezing or Snowy Conditions.........
8
3. Troubleshooting...................................................................
9
[1] Diagnosing Problems Using Error Codes .........................
9
[2] Calling for Service...........................................................
12
4. Safety and Maintenance Information .................................
13
[1] Contact information............................................................
13
[2] Refrigerant Information ...................................................
13
[3] Periodic Inspection..........................................................
13
[4] Parts Inspection and Replacement Intervals...................
16
[5] Safety, Ventilation, and Fire-Extinguishing Devices........
16
5. Warranty ............................................................................
17
[1] Terms and Conditions.....................................................
17
[2] Exclusions.......................................................................
17
6. Main Specifications............................................................
18
CAHV-P500YA-HPB
2/20
Safety Precautions
• Thoroughly read the following safety precautions prior to use.
• Observe these precautions carefully to ensure safety.
■General
WARNING
To reduce the risk of burns or electric shock,
do not touch exposed pipes and wires.
To reduce the risk of burns or frost bites, do
not touch the pipes or refrigerant circuit
components with bare hands during and
immediately after operation.
To reduce the risk of shorting, current leakage,
electric shock, malfunctions, smoke, or fire, do
not splash water on electric parts.
To reduce the risk of injury, keep children away
while installing, inspecting, or repairing the
unit.
To reduce the risk of electric shock,
malfunctions, smoke or fire, do not operate
the switches/buttons or touch other electrical
p
arts with wet hands.
To reduce the risk of fire or explosion, do not
use volatile or flammable substances as a heat
carrier.
To reduce the risk of electric shock and injury
from the fan or other rotating parts, stop the
operation and turn off the main power before
cleaning, maintaining, or inspecting the unit.
CAUTION
WARNING
Do not install the unit in a place where large
amounts of oil, steam, organic solvents, or
corrosive gases such as sulfuric gas are
present or where acidic/alkaline solutions
or sprays containing sulfur are used
frequently.
These substances can compromise the
performance of the unit or cause certain
components of the unit to corrode, which can
result in refrigerant leakage, water leakage,
injury, electric shock, malfunctions, smoke, or
fire.
Do not try to defeat the safety features of
the unit or make unauthorized setting
changes.
Forcing the unit to operate the unit by
defeating the safety features of the devices
such as the pressure switch or the temperature
switch, making unauthorized changes to the
switch settings, or using accessories other
than the ones recommended by Mitsubishi
Electric may result in smoke, fire, or explosion.
Keep the space well ventilated.
Refrigerant can displace air and cause oxygen
starvation. If leaked refrigerant comes in
contact with a heat source, toxic gas may be
generated.
IMPORTANT
Indicates a risk of injury or structural damage
Indicates a risk of death or serious injury
Indicates a risk of damage to the unit or other components in the system
3/20
If any abnormality (e.g., burning smell) is
noticed, stop the operation, turn off the
power switch, and consult your dealer.
Continuing the operation may result in electric
shock, malfunctions, or fire.
Always replace a fuse with one with the
correct current rating.
The use of improperly rated fuses or a
substitution of fuses with steel or copper wire
may result in fire or explosion.
Properly install all required covers and
panels on the terminal box and control box
to keep moisture and dust out.
Dust accumulation and water may result in
electric shock, smoke, or fire.
Consult an authorized agency for the
proper disposal of the unit.
Refrigerant oil and refrigerant that may be left
in the unit pose a risk of fire, explosion, or
environmental pollution.
CAUTION
To reduce the risk of fire or explosion, do not
place flammable materials or use flammable
sprays around the unit.
The model of heat pump unit described in this
manual is not intended for use to preserve
food, animals, plants, precision instruments, or
art work.
Do not operate the unit without panels and
safety guards properly installed.
To reduce the risk of injury, do not sit, stand,
or place objects on the unit.
To reduce the risk of adverse effects on plants
and animals, do not place them where they
are directly exposed to discharge air from the
unit.
To reduce the risk of injury, do not touch the
heat exchanger fins or sharp edges of
components with bare hands.
To reduce the risk of injury, do not insert
fingers or foreign objects into air inlet/outlet
grills. If the unit is left on a damaged base, it
may fall and cause injury.
To reduce the risk of injury, wear protective
gear when working on the unit.
Do not place a container filled with water
on the unit.
If water spills on the unit, it may result in
shorting, current leakage, electric shock,
malfunction
,
smoke, or fire.
Always wear protective gears when
touching electrical components on the
unit.
Several minutes after the power is switched
off, residual voltage may still cause electric
shock.
In areas where temperature drops to freezing,
use an anti-freeze circuit and leave the main
power turned on to prevent the water in the
water circuit from freezing and damaging the
unit or causing water leakage and resultant
damage to the furnishings.
Do not connect the makeup water pipe
directly to the potable water pipe. Use a
cistern tank between them.
Connecting these pipes directly may cause the
water in the unit to migrate into the potable
water and cause health problems.
Do not install the unit on or over things
that are vulnerable to water damage.
Condensation may drip from the unit.
Do not release refrigerant into the
atmosphere. Collect and reuse the
refrigerant, or have it properly disposed of
by an authorized agency.
Refrigerant poses environmental hazards if
released into the air.
4/20
■Installation
■Transportation and repairs
WARNING
WARNING
CAUTION
Periodically check the installation base for
damage.
To reduce the risk of shorting, electric shock,
fire, or malfunction, do not touch the circuit
board with tools or with your hands, and do
not allow dust to accumulate on the circuit
board.
Use clean tap water.
The use of acidic or alkaline water or water
high in chlorine may corrode the unit or the
pipes, causing water leakage and resultant
dama
g
e to the furnishings.
In areas where temperature can drop low
enough to cause the water in the pipes to
freeze, operate the unit often enough to
prevent the water from freezing.
Frozen water in the water circuit may cause
the water to freeze, resulting in burst pipes
and damage to the unit or the furnishings.
To prevent environmental pollution,
dispose of brine in the unit or cleaning
solutions according to the local
regulations.
It is punishable by law not to dispose of them
according to the applicable laws.
Periodically inspect and clean the water
circuit.
Dirty water circuit may compromise the unit's
performance or corrodes the unit or cause
water leakage and resultant damage to the
furnishings.
The water heated by the heat pump is not
suitable for use as drinking water or for
cooking.
It may cause health problems or degrade food.
In areas where temperature drops to
freezing during the periods of non-use,
blow the water out of the pipes or fill the
pipes with anti-freeze solution.
Not doing so may cause the water to freeze,
resulting in burst pipes and damage to the unit
or the furnishings.
The unit should be moved, disassembled,
or repaired only by qualified personnel. Do
not alter or modify the unit.
Improper repair or unauthorized modifications
may result in refrigerant leakage, water
leakage, injury, electric shock, or fire.
After disassembling the unit or making
repairs, replace all components as they
were.
Failing to replace all components may result in
injury, electric shock, or fire.
As an anti-freeze, use ethylene glycol or
propylene glycol diluted to the specified
concentration.
The use of other types of anti-freeze solution
may cause corrosion and resultant water
leakage. The use of flammable anti-freeze may
cause fire or explosion.
5/20
■General
IMPORTANT
To avoid damage to the unit, use appropriate
tools to install, inspect, or repair the unit.
To reduce the risk of malfunctions, use the unit
within its operating range.
To reduce the risk or malfunction, turn on the
power at least 12 hours before starting
operation, and leave the power turned on
throu
g
hout the operating season.
To maintain optimum performance and reduce
the risk of malfunction, keep the air pathway
clear.
Do not unnecessarily change the switch
settings or touch other parts in the
refrigerant circuit.
Doing so may change the operation mode or
damage the unit.
Recover all refrigerant from the unit.
It is punishable by law to release refrigerant into
the atmosphere.
Do not switch on or off the main power in a
cycle of shorter than 10 minutes.
Short-cycling the compressor may damage the
compressor.
Check the water system, using a relevant
manual as a reference.
Using the system that does not meet the
standards (including water quality and water
flow rate) may cause the water pipes to
corrode.
To ensure proper operation of the unit,
periodically check for proper concentration
of anti-freeze.
Inadequate concentration of anti-freeze may
compromise the performance of the unit or
cause the unit to abnormally stop.
6/20
1. External Appearance and Components
Discharge air outlet
Intake air inlet
Service panel
Hot water outlet
Control box
Hot water inlet
Service panel
Control box
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