Midea MRC-36CWN1-V10 - Error Code

R410A Rooftop Package Unit 60Hz MCAC-RTSM-2014-03
42
17. Error Code
No.
Code
LED1(Red)
LED2(Yellow)
LED3(Green)
1
Standby
OFF
OFF
ON
2
Function
ON
ON
ON
3
Lack of phase
Flash
Flash
Flash
4
Phase-error
Flash
Flash
OFF
5
T3 sensor failure
OFF
Flash
Flash
High pressure protection
Vent protection
6
T2 sensor failure
Flash
OFF
Flash
7
T2 Evaporator low temp, protection
OFF
Flash
OFF
8
T3 Condenser high temp, protection
Flash
OFF
OFF
9
Wired controller input failure
Flash
Flash
ON
10
Compressor current protection
OFF
OFF
Flash
11
Compressor-inhaling low pressure protection
Flash
ON
Flash
1. Indoor fan failure
Check whether the power supply is normal, each wired port is fastened , the setting and wiring of the wired
controller is right.
Confirm the above and check as the following step.
Yes no
Yes no
no
no
Check the PCB, whether there is
208/230 voltage between CN9 and L1.
Cut off the power supply and check
whether the fan capacitor is normal .
Replace the PCB.
yes
no
Check the PCB, whether there is 24V voltage
between G and C.
Check whether the fuse on the
PCB has fused.
yes
Replace the motor.
Replace the motor capacitor.
yes
Replace fuse.
Check whether the
transformer is normal
and the secondary has
24v.
Check the wired
controller and wring.
Replace
transformer.