Indicator lamps continue flashing
Error code appears and begins with the
letters, as shown below in window display
of the indoor unit:
• EH(xx), EL(xx), EC(xx)
• PC(xx)
Page 41 mrcool.com
Symptom Solution
The unit may stop operation or continue to run
safely. If the indicator lamps continue to flash or
error codes appear, wait for roughly 10 minutes. The
problem may resolve itself. If not, disconnect the
power, then connect it again. Turn the unit on. If the
problem persists, disconnect the power and contact
your nearest customer service center.
Operation
Lamp
Timer
Lamp
LED
Display
Error Information
Solution
(section)
1 time OFF
EH 00
Indoor unit EEPROM parameter error. 10.1
2 times OFF
EL 01
Indoor / outdoor unit communication error. 10.2
3 times OFF
EH 02
Zero-crossing signal detection error (for some models). 10.3
4 times OFF
EH 03
The indoor fan speed is operating outside of the normal range. 10.4
5 times OFF
EC 51
Outdoor unit EEPROM parameter error (for some models). 10.1
5 times OFF
EC 52
Condenser coil temperature sensor T3 is in open circuit or has short circuited. 10.5
5 times OFF
EC 53
Outdoor room temperature sensor T4 is in open circuit or has short circuited. 10.5
5 times OFF
EC 54
Compressor discharge temperature sensor TP is in open circuit or has
short circuited.
10.5
5 times OFF
EC 56
Evaporator coil outlet temperature sensor T2B is in open circuit or has short
circuited (for free-match indoor units).
10.5
6 times OFF
EH 60
Indoor room temperature sensor T1 is in open circuit or has short circuited. 10.5
6 times OFF
EH 61
Evaporator coil temperature sensor T2 is in open circuit or has short circuited. 10.5
12 times OFF
EC 07
The outdoor fan speed is operating outside of the normal range (for some
models).
10.4
9 times OFF
EH 0b
Indoor PCB / Display board communication error. 10.6
8 times OFF
EL 0C
Refrigerant leak detected. 10.7
7 times FLASH
PC 00
IPM malfunction or IGBT over-strong current protection. 10.8
2 times FLASH
PC 01
Over voltage or over low voltage protection. 10.9
3 times FLASH
PC 02
High temperature protection of IPM module or high pressure protection (for
some models).
10.10
5 times FLASH
PC 04
Inverter compressor drive error. 10.12
1 time FLASH
PC 08
Current overload protection (for some models). 10.13
7 times FLASH
PC 03
Low pressure protection (for some models). 10.11
1 times ON
--
Indoor units mode conflict (match with multi outdoor unit).
--
Indoor Unit Error Display
When the indoor unit encounters a recognized error, the operation lamp will flash in a corresponding series,
the timer lamp may turn on or begin flashing, and an error code will be displayed. These error codes are
described in the table below:
WARNING
The error codes above and descriptions on the following pages are for reference only. DO NOT
attempt these repairs yourself, as doing this could cause personal injury, damage to your unit,
and/or void the warranty. Should your unit display any of the error codes above, turn off the unit
and contact a qualified service technician to investigate the matter further.
To Next Page
Loading...
Need help?
General
