Johnson Controls YVAHP072B31S, Service Manual

Page: 724 / 1796

1. Safety Summary
Signal Words
Indicates a hazardous situation that, if not avoided, could result in death or serious injury.
Indicates a hazardous situation that, if not avoided, could result in minor or moderate injury.
Indicates information considered important, but not hazard-related (for example,
messages relating to property damage).
General Precautions
To reduce the risk of serious injury or death, read these instructions thoroughly and
follow all warnings or cautions included in all manuals that accompanied the product
and are attached to the unit.
Refer back to these safety instructions as needed.
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guard against possible damage or injury that might occur in an earthquake.
If the unit is not installed correctly, injuries may occur because of a falling unit.
Ɣ Use appropriate Personal Protective Equipment (PPE), such as gloves, protective goggles and electrical
protection equipment and tools suited for electrical operation purposes.
Ɣ When transporting, be careful when picking up, moving and mounting these units.
Although the controller may be packed using plastic straps, do not use them for transporting from one location
to another. Do not stand on or put any material on the controller.
Ɣ When installing the controller cabling to the units, do not touch or adjust any safety devices inside the indoor
or outdoor units. All safety features, disengagement, and interlocks must be in place and functioning correctly
before the equipment is put into operation. If these devices are improperly adjusted or tampered with in any way,
a serious accident can occur. Never bypass, wire around, or jump-out any safety device or switch.
Ɣ Use only Johnson Controls recommended, provided as standardized, or replacement parts.
Ɣ Johnson Controls will not assume any liability for injuries or damage caused by not following steps outlined or
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ƕ May create hazards which could result in death, serious injury or equipment damage;
ƕ Will void product warranties;
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ƕ May violate OSHA standards;
Take the following precautions to reduce the risk of property damage.
Ɣ Do not touch the main circuit board or electronic components in the controller or remote devices. Make sure that
dust and/or steam does not accumulate on the circuit board.
Ɣ When installing the unit in a hospital or other facility where electromagnetic waves are generated from nearby
medical and/or electronic devices, be prepared for Electromagnetic Interference (EMI). Do not install where
the waves can directly radiate into the electrical box, controller cable, or controller. Inverters, appliances, high-
frequency medical equipment, and radio communications equipment may cause the unit to malfunction. The
operation of the unit may also adversely affect these same devices. Install the unit at least 10 ft. (approximately
3m) away from such devices.
IMPORTANT:
READ AND UNDERSTAND THIS MANUAL BEFORE USING THIS COMPUTERIZED CENTRAL
CONTROLLER ADAPTER.
KEEP THIS MANUAL FOR FUTURE REFERENCE.
IMPORTANT NOTICE:
Ɣ No part of this manual may be reproduced without the expressed written permission of Hitachi or
Johnson Controls, Inc.
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are provided below with their respective signal words.
1-708
Service Manual
INSTALLATION