Mitsubishi Electric HP120TNU-A Service Handbook page 168

[7-1 Error Code and Preliminary Error Code Lists ]
The last digit in the check error codes in the 4000's and 5000's and two-digit detail codes indicate if the codes apply to inverter
on fan inverter.
Example
Code 4225 (detail code 108): Bus voltage drop in the fan inverter system
Code 4230 : Heatsink overheat protection in the inverter system
The last digit
0 or 1
5 or 6
<Compressor inverter>
INV board Outdoor units
INV42Y HP72YNU
INV42Y HP96YNU
INV42Y HP120YNU
INV38 HP72TNU
INV38 HP96TNU
INV38 HP120TNU
<Fan inverter>
INV board Outdoor units
HP72YNU
INV/S15Y HP96YNU
HP120YNU
HP72TNU
INVS/16Y HP96TNU
HP120TNU
HWE18220_GB
Inverter system
Compressor inverter system
Fan inverter system
Overload protec- Current effective
tion Imax (Arms) value error (Arms)
27 33
48 58
51 61
Overload protec- Current peak value
tion Imax (Arms) error (Apeak)
4.5 8.5
6.5 12
Current peak value Temperature
error (Apeak) protection TOL (°C)
56 95
99
95
104
5
chapter 7 -