Service manual

68
69
SW2 setting Display detail Explanation for display Unit
degF
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. 0.5secs. 2 secs.
50
1
Sub cool on error occurring. SC
0~234
Cooling = TH6-TH3
Heating = TH5-TH2
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. 0.5secs. 2 secs.
15
1
Thermo-on time until error stops
0~999
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. 0.5secs. 2 secs.
15
4
1
ON
2 3 4 5 6
Discharge superheat on error occurring
SHd
0~327
Cooling = TH4-TH6
Heating = TH4-TH5
1
ON
2 3 4 5 6
1
ON
2 3 4 5 6
degF
Minute
1
ON
2 3 4 5 6
Normal
Overvoltage error
Undervoltage error
Input current sensor error
L1 or L2-phase open error
Abnormal power
synchronous signal
ACTM error
Undervoltage
 Display examples for multiple errors:
Overvoltage (01) + Undervoltage (02) = 03
Undervoltage (02) + Power-sync signal error (08) = 0A
L1 phase open error (04) + ACTM error (20) = 24
Power circuit board
Controller circuit board
Controller circuit board
Power circuit board
Check CNAF wiring.
Defective ACTM/ P.B
Description Detection point Display
00
01
02
04
08
20
U9 Error status during the Error
postponement period
Code
display
Pulse
LEV-B opening pulse
0~480
0~480
(When it is 100 pulse or more, hundreds digit, tens
digit and ones digit are displayed by turns.)
1
ON
2 3 4 5 6
0~480
(When it is 100 pulse or more, hundreds digit, tens
digit and ones digit are displayed by turns.)
Pulse
1
ON
2 3 4 5 6
LEV-C opening pulse
0~480
Outdoor pipe temperature(TH33)
-38~190
1
ON
2 3 4 5 6
˚F
-38~190 (-39~88°C)
(When the temperature is 0˚F or less, “–” and
temperature are displayed by turns.)
(Example) When –15˚F;
0.5 secs. 0.5secs. 2 secs.
15