Mitsubishi Electric CRHV-P600YA-HPB How to use

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HWE1312A GB
Safety Precautions
• Thoroughly read the following safety precautions prior to use.
• Observe these precautions carefully to ensure safety.
WARNING
CAUTION
WARNING
Indicates a risk of death or serious injury
CAUTION
Indicates a risk of injury or structural damage
IMPORTANT
Indicates a risk of damage to the unit or other components in the system
General
All electric work must be performed by personnel certified by Mitsubishi Electric.
Do not use refrigerant other than the type indicated in
the manuals provided with the unit and on the
nameplate.
• Doing so may cause the unit or pipes to burst, or result in
explosion or fire during use, during repair, or at the time of
disposal of the unit.
• It may also be in violation of applicable laws.
• MITSUBISHI ELECTRIC CORPORATION cannot be held
responsible for malfunctions or accidents resulting from the
use of the wrong type of refrigerant.
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.
To reduce the risk of fire or explosion, do not use volatile or
flammable substances as a heat carrier.
To reduce the risk of burns or electric shock, do not touch
exposed pipes and wires.
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 electric shock, malfunctions, smoke or
fire, do not operate the switches/buttons or touch other
electrical parts with wet hands.
To reduce the risk of burns or frost bites, do not touch the
refrigerant pipes or refrigerant circuit components with bare
hands during and immediately after operation.
Before cleaning the unit, switch off the power.
(Unplug the unit, if it is plugged in.)
To reduce the risk of injury, keep children away while
installing, inspecting, or repairing the unit.
Children should be supervised to ensure that they do not play
with the appliance.
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.
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.
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.
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.
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.
To reduce the risk of fire or explosion, do not place flammable
materials or use flammable sprays around the unit.
Do not operate the unit without panels and safety guards
properly installed.

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HWE1312A GB
WARNING
CAUTION
WARNING
To reduce the risk of injury, do not sit, stand, or place objects
on the unit.
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.
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 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.
To reduce the risk of injury, wear protective gear when
working on 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.
To prevent environmental pollution, dispose of brine in
the unit and cleaning solutions according to the local
regulations.
It is punishable by law not to dispose of them according to the
applicable laws.
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.
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.
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 damage 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.
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.
Ensure that the flow rate of the feed-water is within the
permitted range.
If the flow rate exceeds the permitted range, the unit may
become damaged due to corrosion.
Furniture may become wet due to water leaks.
Transportation
Lift the unit by placing the slings at designated
locations. Support the outdoor unit securely at four
points to keep it from slipping and sliding.
If the unit is not properly supported, it may fall and cause
personal injury.
To reduce the risk of injury, do not carry the product by the PP
bands that are used on some packages.
To reduce the risk of injury, products weighing 20 kg or more
should be carried by two or more people.
Installation
Do not install the unit where there is a risk of leaking
flammable gas.
If flammable gas accumulates around the unit, it may ignite
and cause a fire or explosion.
Properly dispose of the packing materials.
Plastic bags pose suffocation hazard to children.

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HWE1312A GB
WARNING
CAUTION
The unit should be installed only by personnel certified
by Mitsubishi Electric according to the instructions
detailed in the Installation/Operation Manual.
Improper installation may result in refrigerant leakage, water
leakage, injury, electric shock, or fire.
Periodically check the installation base for damage.
If the unit is left on a damaged base, it may fall and cause
injury.
Remove packing materials from the unit before operating
the unit. Note that some accessories may be taped to the
unit. Properly install all accessories that are required.
Failing to remove the packing materials or failing to install
required accessories may result in refrigerant leakage,
oxygen starvation, smoke, or fire.
Consult your dealer and take appropriate measures to
safeguard against refrigerant leakage and resultant oxygen
starvation. An installation of a refrigerant gas detector is
recommended.
Any additional parts must be installed by qualified personnel.
Only use the parts specified by Mitsubishi Electric.
Take appropriate safety measures against wind gusts and
earthquakes to prevent the unit from toppling over and
causing injury.
Be sure to install the unit horizontally, using a level.
If the unit is installed at an angle, it may fall and cause injury
or cause water leakage.
The unit should be installed on a surface that is strong
enough to support its weight.
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.
Pipe installation
To prevent explosion, do not heat the unit with refrigerant gas
in the refrigerant circuit. Check for refrigerant leakage at the completion of
installation.
If leaked refrigerant comes in contact with a heat source,
toxic gas may be generated.
Check that no substance other than the specified
refrigerant (R410A) is present in the refrigerant circuit.
Infiltration of other substances may cause the pressure to
rise abnormally high and cause the pipes to explode.
To keep the ceiling and floor from getting wet due to
condensation, properly insulate the pipes.
Piping work should be performed by the dealer or
qualified personnel according to the instructions
detailed in the Installation Manual.
Improper piping work may cause water leakage and damage
the furnishings.
To keep the ceiling and floor from getting wet due to
condensation, properly insulate the pipes.
Electrical wiring
To reduce the risk of wire breakage, overheating, smoke, and
fire, keep undue force from being applied to the wires.
Properly secure the cables in place and provide
adequate slack in the cables so as not to stress the
terminals.
Improperly connected cables may break, overheat, and
cause smoke or fire.
To reduce the risk of injury or electric shock, switch off the
main power before performing electrical work.
All electric work must be performed by a qualified
electrician according to the local regulations, standards,
and the instructions detailed in the Installation Manual.
Capacity shortage to the power supply circuit or improper
installation may result in malfunction, electric shock, smoke,
or fire.
To reduce the risk of electric shock, smoke, or fire, install an
inverter circuit breaker on the power supply to each unit.
Use properly rated breakers and fuses (inverter breaker,
Local Switch <Switch + Type-B fuse>, or no-fuse
breaker).
The use of improperly rated breakers may result in
malfunctions or fire.
To reduce the risk of current leakage, overheating, smoke, or
fire, use properly rated cables with adequate current carrying
capacity.
Keep the unsheathed part of cables inside the terminal
block.
If unsheathed part of the cables come in contact with each
other, electric shock, smoke, or fire may result.
Proper grounding must be provided by a licensed
electrician. Do not connect the grounding wire to a gas
pipe, water pipe, lightning rod, or telephone wire.
Improper grounding may result in electric shock, smoke, fire,
or malfunction due to electrical noise interference.

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HWE1312A GB
CAUTION
WARNING
CAUTION
To reduce the risk of current leakage, wire breakage, smoke,
or fire, keep the wiring out of contact with the refrigerant
pipes and other parts, especially sharp edges.
To reduce the risk of electric shock, shorting, or malfunctions,
keep wire pieces and sheath shavings out of the terminal
block.
Transportation and repairs
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.
If the supply cord is damaged, it must be replaced by the
manufacturer, its service agent or similarly qualified persons
in order to avoid a hazard.
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.
IMPORTANT
To avoid damage to the unit, use appropriate tools to install,
inspect, or repair the unit.
To reduce the risk or malfunction, turn on the power at least
12 hours before starting operation, and leave the power
turned on throughout the operating season.
Recover all refrigerant from the unit.
It is punishable by law to release refrigerant into the
atmosphere.
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.
To reduce the risk of malfunctions, use the unit within its
operating range.
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.
To maintain optimum performance and reduce the risk of
malfunction, keep the air pathway clear.
To reduce the risk of both the breaker on the product side and
the upstream breaker from tripping and causing problems,
split the power supply system or provide protection
coordination between the earth leakage breaker and no-fuse
breaker.
When servicing the refrigerant, open and close the check
joint using two spanners, as there is the risk of
refrigerant leaking due to damaged piping.
Please build the hot water and heat source fluid circuit
so that it is a closed system.
Do not use hot water directly for showers or other
applications.
Do not allow other heat source liquids to mix with the hot
water and heat source fluid circuit.
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.
Take appropriate measures against electrical noise
interference when installing the air conditioners in
hospitals or facilities with radio communication
capabilities.
Inverter, high-frequency medical, or wireless communication
equipment as well as power generators may cause the air
conditioning system to malfunction. Air conditioning system
may also adversely affect the operation of these types of
equipment by creating electrical noise.
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 reduce the risk of power capacity shortage, always use a
dedicated power supply circuit.
Have a backup system, if failure of the unit has a potential for
causing significant problems or damages.
This appliance is intended to be used by expert or trained
users in shops, in light industry and on farms, or for
commercial use by lay persons.

CONTENTS
HWE1312A GB
I Read Before Servicing
[1] Read Before Servicing.............................................................................................................. 3
[2] Necessary Tools and Materials ................................................................................................ 4
[3] Brazing...................................................................................................................................... 5
[4] Air Tightness Test..................................................................................................................... 6
[5] Vacuum Drying (Evacuation) .................................................................................................... 7
[6] Refrigerant Charging ................................................................................................................ 8
[7] Remedies to be taken in case of a Refrigerant Leak................................................................ 8
[8] Characteristics of the Conventional and the New Refrigerants ................................................ 9
[9] Notes on Refrigerating Machine Oil........................................................................................ 10
II Restrictions
[1] System Configuration ............................................................................................................. 13
[2] Types and Maximum allowable Length of Cables .................................................................. 14
[3] Main Power Supply Wiring and Switch Capacity .................................................................... 15
[4] Sample Installation ................................................................................................................. 18
[5] Switch Types and the Factory Settings .................................................................................. 19
[6] Configuring the Settings ......................................................................................................... 20
[7] Water Pipe Installation............................................................................................................ 27
III Unit Components
[1] Unit Components and Refrigerant Circuit ............................................................................... 37
[2] Control Box of the Unit............................................................................................................ 39
[3] Unit Circuit Board.................................................................................................................... 40
IV Remote Controller
[1] Using the Remote Controller .................................................................................................. 47
[2] Function Settings .................................................................................................................... 52
V Electrical Wiring Diagram
[1] Electrical Wiring Diagram ....................................................................................................... 57
VI Refrigerant Circuit
[1] Refrigerant Circuit Diagram .................................................................................................... 63
[2] Principal Parts and Functions ................................................................................................. 64
VII Control
[1] Functions and Factory Settings of the Dipswitches ................................................................ 69
[2] Operating characteristics and Control Capabilities................................................................. 87
VIII Test Run Mode
[1] Items to be checked before a Test Run................................................................................ 103
[2] Test Run Method .................................................................................................................. 105
[3] Operating the Unit................................................................................................................. 106
[4] Refrigerant ............................................................................................................................ 108
[5] Symptoms that do not Signify Problems............................................................................... 108
[6] Standard operating characteristics (Reference data) ........................................................... 108
IX Troubleshooting
[1] Maintenance items................................................................................................................ 111
[2] Troubleshooting .................................................................................................................... 119
[3] Troubleshooting Principal Parts............................................................................................ 125
[4] Refrigerant Leak ................................................................................................................... 141
[5] Parts Replacement Procedures............................................................................................ 142
X Attachments
[1] R410A saturation temperature table..................................................................................... 161

CONTENTS
HWE1312A GB

- 1 -
HWE1312A GB
I Read Before Servicing
[1] Read Before Servicing .......................................................................................................3
[2] Necessary Tools and Materials.......................................................................................... 4
[3] Brazing............................................................................................................................... 5
[4] Air Tightness Test..............................................................................................................6
[5] Vacuum Drying (Evacuation) ............................................................................................. 7
[6] Refrigerant Charging.......................................................................................................... 8
[7] Remedies to be taken in case of a Refrigerant Leak .........................................................8
[8] Characteristics of the Conventional and the New Refrigerants ......................................... 9
[9] Notes on Refrigerating Machine Oil .................................................................................10

- 2 -
HWE1312A GB

[ I Read Before Servicing ]
- 3 -
HWE1312A GB
I Read Before Servicing
[1] Read Before Servicing
1. Check the type of refrigerant used in the system to be serviced.
Refrigerant Type
Hot water Heat pump CRHV-P600YA-HPB:R410A
2. Check the symptoms exhibited by the unit to be serviced.
Refer to this service handbook for symptoms relating to the refrigerant cycle.
3. Thoroughly read the safety precautions at the beginning of this manual.
4. Preparing necessary tools: Prepare a set of tools to be used exclusively with each type of refrigerant.
Refer to "Necessary Tools and Materials" for information on the use of tools.(page 4)
5. If there is a leak of gaseous refrigerant and the remaining refrigerant is exposed to an open flame, a poisonous gas
hydrofluoric acid may form. Keep workplace well ventilated.
CAUTION
Install new pipes immediately after removing old ones to keep moisture out of the refrigerant circuit.
The use of refrigerant that contains chloride, such as R22, will cause the refrigerating machine oil to deteriorate.