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10
START−UP
Test Operation
Perform a test operation after completing the gas leak and electrical safety check. See the indoor unit installation instructions and owner’s
manual for additional start up information.
SYSTEM CHECKS
1. Conceal the tubing where possible.
2. Ensure the drain tube slopes downward along its entire length.
3. Ensure all tubing and connections are properly insulated.
4. Fasten the tubes to the outside wall, when possible.
5. Seal the hole through which the cables and tubing pass.
OUTDOOR UNIT
1. Are there unusual noises or vibrations during operation?
Explain the Following Items to the Customer (with the aid of the Owner’s Manual):
1. Explain care and maintenance.
2. Present the installation instructions to the customer.
TROUBLESHOOTING
For ease of service, the systems are equipped with diagnostic code display LEDs on both the indoor and outdoor units. The outdoor
diagnostic display consists of two LEDs (Red and Green) on the outdoor unit board and is limited to very few errors. The indoor diagnostic
display is a combination of flashing LEDs on the display panel or the front of the unit.
There may be a few error codes displayed on the indoor unit that might relate to the outdoor unit’s problems. If possible, always check the
diagnostic codes displayed on the indoor unit first.
The diagnostic codes displayed in the outdoor units are listed in Table 9.
Table 9—Outdoor Unit Diagnostic Guides
GREEN LED RED LED FAILURE MODE
On X Standby, normal
X On Operation, normal
On On High/Low voltage protection on compressor terminal
On ☆ EEPROM error
X ☆ The compressor speed is out of control
☆ On Zero-crossing signal detection error; lack of phase; synchronization error
☆ X IGBT or Module protection
☆ ☆ Communication error
☆ = Flashing, X = Off
For additional diagnostic information, refer to the Service Manual.
Copyright 2016 Carrier Corp. D 7310 W. Morris St. D Indianapolis, IN 46231 . Edition Date: 05/16
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Catalog No: 38MAQ-01SI
Replaces: NEW