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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.
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.
Thermostat-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.
50
1
1
ON
23456
Discharge superheat on error occurring
SHd
0~327
Cooling = TH4-TH6
Heating = TH4-TH5
1
ON
23456
1
ON
23456
degF
Minute
15
1
15
4
1
ON
23456
Normal
Overvoltage error
Undervoltage error
Input current sensor error.
L1 or L2-phase open error.
Abnormal power synchronous signal
PFC error (A12, 18, 24NHA)
(Overvoltage / Undervoltage / Overcurrent)
PFC/ ACTM error
Undervoltage
W Display examples for multiple errors:
Overvoltage (01) + Undervoltage (02) = 03
Undervoltage (02) + Power-sync signal error (08) = 0A
L
1 phase open error (04) + PFC error (10) = 14
Power circuit board
Controller circuit board
Controller circuit board
Power circuit board
Power circuit board
Check CNAF wiring.
Defective ACTM/ P.B.
—
Description Detection point Display
00
01
02
04
08
10
20
U9 Error status during the Error
postponement period
Code
display
OCH429--3.qxp 07.11.20 9:19 AM Page 83