E3980 VRSS
21
Error codes
It is possible for error codes to be displayed on the control screen. In the event of a
malfunction an alarm will sound and the alarm indicator will be displayed. An error
code or codes will flash intermittently on the display. If there are multiple codes, the
display will continuously cycle through them.
Mute: You may mute the alarm by pressing any button. The red alarm symbol and all
error codes will still be displayed. When the fault is remedied, the control will return to
normal operation and will automatically clear the codes from the display.
Error Codes
Display Description
Cause
Resolution
“P1”
Air discharge
temperature
probe failure
Probe signal
is interrupted
or short-
circuited
•
Check to ensure probe wires and quick disconnect are
secure in control.
•
Check probe resistance to table below. If 0 resistance is
present, check wiring insulation. If infinite resistance is
present, check for breaks in wiring (meter will likely read
overload or very high in the mega-ohm range).
•
Ensure that probes are wired per the wiring diagram
provided. Replace probe if other remedies fail, or if
probe resistance deviates from “Table 3” below.
“P2”
Defrost
temperature
probe failure
TEMPERATURE PROBE COMMON RESISTANCE CHART
Probe Temp
Maximum
Resistance [
Ω]
Normal
Resistance [Ω]
Minimum
Resistance [
Ω]
32°F(0°C)
27.83
27.28
26.74
77°F(25°C)
10.1
10
9.9
212°F(100°C)
1
0.97
0.94
