Service Manual
1-349
INSTALLATION
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Only use electrical protection equipment.
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Communication cable shall be a minimum Communication cable shall be a minimum of AWG18
(0.82mm
2
), 2-Conductor, Stranded Copper. Shielded cable must be considered for applications
and routing in areas of high EMI and other sources of potentially excessive electrical noise to
reduce the potential for communication errors. When shielded cable is applied, proper bonding and
termination of the cable shield is required as per Johnson Controls guidelines. Plenum and riser
ratings for communication cables must be considered per application and local code requirements.
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Be sure to install circuit breakers (ground fault interrupter, isolating switch, molded case circuit
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Clamp electrical wires securely with a cable clamp after all wiring is connected to the terminal
block. In addition, run wires securely through the wiring access channel.
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When installing the power lines, do not apply tension to the cables. Secure the suspended cables
at regular intervals, but not too tightly.
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Make sure that the terminals do not come into contact with the surface of the electrical box. If the
terminals are too close to the surface, it may lead to failures at the terminal connection.
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Turn OFF and disconnect the unit from the power supply when handling the service connector. Do
not open the service cover or access panel to the indoor or outdoor units without turning OFF the
main power supply.
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switch. Otherwise, water leakage or electrical breakdown may result. Disconnect the power
supply completely before attempting any maintenance for electrical parts. Check to ensure that no
residual voltage is present after disconnecting the power supply.
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Do not clean with, or pour water into, the controller as it could cause electric shock and/or damage
the unit. Do not use strong detergent such as a solvent. Clean with a soft cloth.
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Check that the ground wiring is securely connected. Do not connect ground wiring to gas piping,
water piping, lighting conductor, or telephone ground wiring.
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If a circuit breaker or fuse is frequently activated, shut down the system and contact your service
contractor.
Summary of Contents for YVAHP072B31S
Page 2: ......
Page 10: ...viii Service Manual ...
Page 16: ......
Page 17: ...Service Manual 1 1 INSTALLATION 1 Installation ...
Page 577: ...Service Manual 1 561 INSTALLATION 9 Touch Back to return to the Service Menu screen 9 ...
Page 920: ......
Page 921: ...Service Manual 2 1 OPERATION 2 Operation ...
Page 1315: ...Service Manual 3 1 TROUBLESHOOTING 3 Troubleshooting ...
Page 1461: ...Service Manual 4 1 MAINTENANCE 4 Maintenance ...
Page 1728: ......
Page 1729: ...Service Manual 6 1 FIELD WORK INSTRUCTIONS 6 Field Work Instructions ...
Page 1738: ...6 10 Service Manual FIELD WORK INSTRUCTIONS 6 8 Mollier Chart for R410A ft 3 l b ...
Page 1739: ...SERVICE PARTS LIST Service Manual 7 1 7 Service Parts List ...
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Page 1796: ... 2015 Johnson Controls Inc SM 15001 ...