Start−Up; Outdoor Unit Diagnostic Guides - Carrier 38MGQ Series Installation Instructions Manual
Multi-zone ductless system
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Also See for 38MGQ Series:
- Installation instructions manual (42 pages) ,
- Service manual (76 pages)
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START−UP
Test Operation
Perform test operation after completing 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.
OUTDOOR UNIT DIAGNOSTIC GUIDES
This unit has on−board diagnostics. Error codes are displayed on the wired remote controller and the outdoor unit microprocessor board with
colored LED lights. Table 14 explains the error codes on both.
DISPLAY
E0
Outdoor EEPROM malfunction
E2
Communication malfunction between indoor and outdoor units
E3
Communication malfunction between IPM board and outdoor main board
E4
Open or short circuit of outdoor temperature sensor (T3、T4、T5、T2B)
E5
Voltage protection
E6
PFC module protection
E8
Outdoor fan speed has been out of control (Only for DC fan motor models)
E9
Wrong wiring connection of 24K indoor unit
F1
No A Indoor unit coil outlet temp. sensor or connector of sensor is defective
F2
No B Indoor unit coil outlet temp. sensor or connector of sensor is defective
F3
No C Indoor unit coil outlet temp. sensor or connector of sensor is defective
F4
No D Indoor unit coil outlet temp. sensor or connector of sensor is defective
F5
No E Indoor unit coil outlet temp. sensor or connector of sensor is defective
F6
No F Indoor unit coil outlet temp. sensor or connector of sensor is defective
P0
Temperature protection of compressor top
P1
High pressure protection
P2
Low pressure protection
P3
Current protection of compressor
P4
Temperature protection of compressor discharge
P5
High temperature protection of condenser
P6
IPM module protection
4. Fasten 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 Customer (with the aid of the
Owner's Manual):
2. Explain care and maintenance.
3. Present the Owner's Manual and installation instructions to
Table 14—Outdoor Unit Error Display
LED STATUS
17
customer.
IDU Error
——
——
——
——
——
——
——
——
——
——
——
——
——
——
IDU Error
F4
E6
E1
E2
——
F2
E6
P1
P0
——
F5
——
——
——
——
——
——
——
——
P2
P3(P1)
——
——
——(P2)
——
——
P0
E5
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