Copyright 2020 CMNA
3300 Riverwood Parkway Atlanta GA 30339 32801002001
TROUBLESHOOTING
For ease of service, the systems are equipped with diagnostic code display LEDs on some outdoor units. The outdoor diagnostic display consists
of two LEDs (red and green) on the outdoor unit board and is limited to a few errors. The indoor diagnostic display is a digital readout on the
display panel. If possible, always check the diagnostic codes displayed on the indoor unit first before consulting a service technician. The
diagnostic codes, displayed in the indoor and outdoor units, are listed in Table 19.
Table 19 — Indoor Unit Diagnostic Guides
For additional diagnostic information, refer to the indoor unit service manual.
ADVANCED SERVICE AND INSTALLATION FUNCTIONS
Refer to the service manual of the Wireless Remote Controller for access to advanced function such as:
• Auto-Start Function
• Temperature Compensation
• Filter reminder
• Indoor Fan Motor Speed Control after set temperature is reached
• Lowest or Highest Temperature Setting
• Static Pressure Setting
All changes should be performed ONLY by authorized professionals.
RUNNING LED TIMER LED DISPLAY ERROR INFORMATION
-- -- dF Defrost
-- -- cF Warming in heating mode
-- -- SC Self clean
-- -- CL Clean filter
-- -- nF Replacing filter
-- -- FP Heating in room temperature under 46°F(8°C)
-- -- FC Forced cooling
-- -- AP AP mode for WIFI setup
-- -- CP Remote start stop contact is open
-- -- AF Constant Air Flow
-- -- LL Remote or Wire controller Lock
-- -- d1 Receive DR1 signal
-- -- d2 Receive DR2 signal
-- -- d3 Receive DR3 signal
-- -- dE DR input error signal
1 time OFF E0 Indoor unit EEPROM parameter error
2 times OFF E1 Indoor/outdoor unit communication error
4 times OFF E3 The indoor fan speed is operating outside of the normal range
5 times OFF E4 Indoor room temperature sensor T1 is in open circuit or has short circuited
6 times OFF E5 Evaporator coil middle temperature sensor T2 is in open circuit or has short circuited
7 times OFF EC Refrigerant leakage detection
8 times OFF EE Water-level alarm malfunction
9 times OFF E8 Communication error between master and slave unit (for twins system)
10 times OFF E9 Another indoor unit malfunction (for twins system)
11 times OFF Ed Outdoor unit malfunction
1 time ON F0 Current overload protection
2 times ON F1 Outdoor room temperature sensor T4 is in open circuit or has short circuited
3 times ON F2 Condenser coil temperature sensor T3 is in open circuit or has short circuited
4 times ON F3 Compressor discharge temperature sensor TP is in open circuit or has short circuited
5 times ON F4 Outdoor unit EEPROM parameter error
6 times ON F5 The outdoor fan speed is operating outside of the normal range
7 times ON F6
E
v
aporator coil outlet temperature sensor T2B is in open circuit or has short circuited (for free-
match indoor units)
11 times ON FA Communication error between indoor two chips
1 time FLASH P0 IPM malfunction or IGBT over-strong current protection
2 times FLASH P1 Over voltage or over low voltage protection
3 times FLASH P2 Top temperature protection of compressor
5 times FLASH P4 Inverter compressor drive error
6 times FLASH -- Indoor units mode conflict (match with multi outdoor unit)
7 times FLASH P6 Low pressure protection
8 times FLASH P7 IGBT temperature sensor TH is in open circuit or has short circuited
To Previous Page
Loading...
Need help?
General
