Mitsubishi Electric PUZ-A18NHA4 Service Manual page 83

SW2 setting
Discharge superheat on error occurring
SHd
0~327
ON
Cooling = TH4 (or TH32)-TH6
Heating = TH4 (or TH32)-TH5
1 2 3 4 5 6
Sub cool on error occurring. SC
0~234
ON
Cooling = TH6-TH3
Heating = TH5-TH2
1 2 3 4 5 6
Thermostat-on time until error stops
0~999
ON
1 2 3 4 5 6
U9 Error status during the Error
postponement period
ON
1 2 3 4 5 6
Display detail
83
The black square (
Explanation for display
0~327 (0~182degC)
(When the temperature is 100degF or more,
hundreds digit, tens digit and ones digit are
displayed by turns.)
(Example) When 150degF;
0.5 secs.
0~234 (0~130degC)
(When the temperature is 100degF or more,
hundreds digit, tens digit and ones digit are
displayed by turns.)
(Example) When 115degF;
0.5 secs.
0~999
(When it is 100 minutes or more, hundreds digit, tens
digit and ones digit are displayed by turns.)
(Example) When 415 minutes;
0.5 secs.
Description
Normal
Power circuit board
Overvoltage error
Controller circuit board
Undervoltage error
Input current sensor error.
Controller circuit board
L1 or L2-phase open error.
Power circuit board
Abnormal power synchronous signal
PFC error (A12, 18, 24NHA)
Power circuit board
(Overvoltage/Undervoltage/Overcurrent)
Check CNAF wiring.
PFC/ACTM error
Defective ACTM/P.B.
Undervoltage
Display examples for multiple errors:
Overvoltage (01) + Undervoltage (02) = 03
Undervoltage (02) + Power-sync signal error (08) = 0A
L phase open error (04) + PFC error (10) = 14
1
■
) indicates a switch position.
0.5 secs. 2 secs.
1
50
0.5 secs. 2 secs.
1 15
0.5 secs. 2 secs.
4 15
Detection point Display
00
–
01
02
04
08
10
20
Unit
degF
degF
Minute
Code
display