Carrier 40TGV0131UP Service Manual page 49

<Wireless remote controller type>
1. Before troubleshooting
1) Require tools/instruments
• and screwdrivers, spanners, radio cutting pliers, nippers, etc.
• Tester, thermometer, pressure gauge, etc.
1) Confirmation points before chec
a) The following operations are normal.
1. Compressor does not operate.
• Is not 3-minutes delay (3 minutes after compressor OFF)?
• Is not the outdoor unit in standby status though the remote controller reached the setup
temperature?
• Does not timer operate during fan operation?
• Is not an overflow error detected on the indoor unit
2. Outdoor fan does not rotate or air volume changes.
• Does not outside low-temperature operation control work in cooling operation?
3. ON/OFF operation cannot be performed from remote controller.
• Is not forced operation performed?
• Is not the control operation performed from outside/remote side?
• Is not automatic address being set up?
• Is not being carried out a test run by operation of the indoor controller?
b) Did you return the cabling to the initial positions?
c) Are connecting cables between indoor unit and receiving unit correct?
1. Troubleshooting procedure
(When the power is turned on at the first time or when indoor unit address setting is changed, the operatio
cannot be performed for maximum approx. 5 minutes after power-ON.)
When a trouble occurred, check the parts along with the following procedure.
→
Trouble
1) Outline of judgment
The primary judgment to check where a trouble occurred in indoor unit or outdoor unit is performed with
the following method.
Method to judge the erroneous position by flashing indication on the display part of indoor unit (sensors
of the receiving unit)
The indoor unit monitors operating status of the air conditioner, and the blocked contents of self-diagnosis are
displayed restricted to the following cases if a protective circuit works.
Confirmation of lamp display
→
Check defective position and parts.
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