Carrier DHMVHA - Indoor Unit Error Codes; Diagnostic Guide Overview

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INDOOR UNIT DIAGNOSTIC GUIDE
Table 10 — Indoor Unit Diagnostic Guide
NOTE: P3* 1. In the HEATING mode, if the outdoor temperature is lower than -
13F (-25C) for 1 hour, the indoor unit displays a PC03 error code.
2. If the outdoor temperature is higher than -7.6F (-22C) for 10 minutes and the compressor stops for 1 hour or the outdoor temperature is higher than
23F (-5C) for 10 minutes, the unit returns to an operating mode.
* Fault Symptom: The display board shows a distorted code or a code that is not an error code found in the service manual nor a
temperature reading.
Table 11 — Indoor Unit Error Display
O (light) X (off) (flash)
RUNNING LAMP TIMER LAMP DISPLAY ERROR INFORMATION SOLUTION
-- -- F Defrost --
-- --
SC Self clean --
-- --
CL Filter cleaning reminder (power on display for 15 seconds) --
-- --
CL Active clean (for some series) --
-- --
F Filter replacement reminder (power on display for 15 seconds) --
-- --
FP Heating in room temperature under 8°C & 12°C --
-- --
FC Forced cooling --
-- --
AP AP mode of WIFI connection --
-- --
CP Remote switched off --
1 time OFF
EH00/
EH0A
EEPROM Parameter Error (EH00/EH0A) Page 15
2 times OFF
EL01 Indoor / Outdoor Unit Communication (EL01) Page 16
3 times OFF
EL02 Zero Crossing Detection Error (EL02) Page 18
4 times OFF
EH03 Fan Speed is Operating Outside of the Normal Range (EH03) Page 19
5 times OFF
EC51 Outdoor EEPROM Parameter Error or Compressor Driven Chip EEPROM parameter (EC51) Page 21
5 times OFF
EC52 Open Circuit or Short Circuit of Temperature Sensor (EC52/53/54/56/EH60/61) Page 22
5 times OFF
EC53 Open Circuit or Short Circuit of Temperature Sensor (EC52/53/54/56/EH60/61) Page 22
5 times OFF
EC54 Open Circuit or Short Circuit of Temperature Sensor (EC52/53/54/56/EH60/61) Page 22
5 times OFF
EC56 Open Circuit or Short Circuit of Temperature Sensor (EC52/53/54/56/EH60/61) Page 22
6 times OFF
EH61 Open Circuit or Short Circuit of Temperature Sensor (EC52/53/54/56/EH60/61) Page 22
12 times OFF
EC07 The Outdoor Fan Speed is Operating Outside of Normal Range (EC07) Page 23
9 times OFF
EH0b Indoor PCB/Display board communication error ---
8 times OFF
EL0C Refrigerant Leakage Detection (EL0C) Page 26
1 time FLASH
PC08 Overload Current Protection (PC08) Page 27
7 times FLASH
PC00 IPM Malfunction or IGBT Over-strong Current Protection (PC00) Page 28
2 times FLASH
PC01 Over voltage or Too Low Voltage Protection (PC01) Page 32
3 times FLASH
PC02 High Temperature Protection of Compressor Top (PC02) Page 33
5 times FLASH
PC04 Inverter Compressor Drive Error (PC04) Page 34
6 times FLASH
PC40 Communication Error Between the Outdoor Main Chip and Compressor (PC40) Page 36
7 times FLASH
PC03 Low pressure protection (PC03) Page 37
1 time ON
-- Indoor units mode conflict (match with multi outdoor unit) Page 38
NO. PROBLEMS
LED3
(GREEN)
LED2
(RED)
IU DISPLAY
1 Standby for normal O X
2 Operation normally X O
3 IPM malfunction or IGBT over-strong current protection
 X P0
4 Over voltage or too low voltage protection O O P1
5 EEPROM parameter error O  E5
6 Inverter compressor drive error X  P4
7 Inverter compressor drive error  O P4
8 Inverter compressor drive error  P4