CONTROL SYSTEM
11-36
SM VAR 1-A.1 GB
11.16 System
Diagnostics
Pressing Mode button for 5-10 seconds in SB or any other operation mode will activate
the DIAGNOSTICS mode, acknowledged by 3 short beeps and lighting of COOL and
HEAT LEDs.
In DIAGNOSTICS mode, system failures will be indicated by the blinking of HEAT &
COOL LEDs.
The coding method is as follows:
x
HEAT LED blinks 5 times in 5 seconds, and then turns off for the next 5
seconds.
x
COOL LED blinks during the same 5 seconds according to the following table:
No.
Problem
1 2 3 4 5
1
RT1 is disconnected
2
RT1 is shorted
3
RV fault
4
RT2 is disconnected
5
RT2 is shorted
6
(Reserved)
7
RT2 temp reading doesn’t change
8
RT3 is disconnected
9
RT3 is shorted
10 (Reserved)
11
RT3 temp reading doesn’t change
12
RT2 & RT3 temp reading doesn’t change
LEGEND
- ON,
- OFF
NOTES
1. If faults occur in more than one thermistor (except case
number 12 in table above), only one fault will be indicated
according to the following order: RT3, RT2, RT1.
2. A/C will return to normal mode when sending a command by
the R/C during system DIAGNOSTICS mode. If the command
from the R/C contains a Group ID, the ID will become the new
Group ID of the ELCON unit.
CONTENT