Lochinvar Harmony - Manual (Page 27)

27
TROUBLESHOOTING
No Display, or Garbled Display
Check the 120VAC power input to the Harmony. Turn power to the
Harmony off and back on.
TEMPERATURE INPUTS
Display shows OPN
Check the System Startup settings (pg. 11) to be sure the Harmony is
configured correctly to read the temperature input. Then check a
sensor is connected and the wires are continuous to the Harmony.
Finally follow the procedure for Incorrect Temperature Display.
Display shows SHT
The Harmony sees a short across the sensor input terminals.
Remove the wires from either the SYSTEM TEMP or OUT TEMP
terminals (whichever is reading SHT). The display should change to
read OPN. If it doesn’t, the Harmony may be damaged.
Display shows an Incorrect Temperature Display
Remove the wires from either the SYSTEM TEMP or OUT TEMP
terminals (whichever is reading incorrectly). The display should
change to read OPN. If it doesn’t, the Harmony may be damaged.
Take an ohm reading across the detached sensor wires. The ohm
reading should correspond to the side chart. If it doesn’t, the sensor
may be damaged.
STAGE OUTPUTS
When the unit's Mode is set to ON, the unit does not come
on
To set the Mode to ON, see pg. 22. Remove any wires attached to the
Harmony output. Check for continuity across the stage's N.O.
contacts. If there is continuity, the Harmony output is working
correctly. Check the wiring and the unit being energized to determine
why it is not operating.
Red stage light is lit, but the unit is not on
The Harmony is calling for this unit to be on. Follow the procedure above.
Red stage light is not lit, but the unit is on
The Harmony is not calling for this unit to be active. Remove any wires attached to the Harmony output. Check for
continuity across the N.O. contacts. If there is no continuity, the Harmony output is working correctly. Check the unit
for any other operating controls which may be causing it to energize.
SYSTEM OUTPUT
Output is required but the SYSTEM component does not come on
Check the display to see if the temperature is above the Set Point or if the Outdoor Cutoff is active.
Red SYSTEM light is lit, but the SYSTEM component is not on
The Harmony is calling for the unit. Check for continuity across the N.O. SYS contacts. If there is continuity, the
Harmony is working correctly. Check the wiring and the component being energized to determine why it is not
operating.
Red stage light is not lit, but the SYSTEM component is on
The Harmony is not calling for the component to run. Remove any wires attached to the Harmony's SYS terminals.
Check the N.O. terminals are open. If they are, check the unit for any other operating controls which may be causing it
to energize.
0 42683
10 31215
20 23089
25 19939
30 17264
35 14985
40 13040
45 11374
50 9944
55 8714
60 7653
70 5941
80 4649
90 3667
100 2914
110 2332
120 1879
130 1524
140 1243
150 1021
160 842
170 699
180 583
190 489
200 412
TEMPERATURE
(in degrees F)
Value
(in Ohms)
TRTRTRTRTR
OUBLESHOOOUBLESHOOOUBLESHOOOUBLESHOOOUBLESHOO
TINGTINGTINGTINGTING