Ray-Dot RVS-22HA Installation Manual - Troubleshooting Guide
TROUBLESHOOTING GUIDE
PROBLEM
CAUSE
SOLUTION
The circuit breaker on the
service panel is off or tripped.
Reset the circuit breaker.
The wiring is incorrect.
Correct the wiring.
The input fuse is open.
Replace the fuse.
The voltage selector switch is in
the wrong position.
Set the switch to the correct position.
There is no display.
The display board interconnect
cable is not properly plugged
into the power supply board.
Be sure the cable is firmly plugged in.
All activated probes are
improperly connected.
Make the correct room probe connection.
The display shows “P Lo”
or “P Hi” when the
parameter selection knob
is set to ROOM TEMP.
All activated probes are
defective.
Refer to “Defective Probes”.
The defective probe pilot
light is on.
One or more probes are
defective.
Refer to “Defective Probes”.
A variation in resistance is
induced on a probe.
Be sure the probes are dry. Locate them
away from drafts and sources of radiant
heating.
The display shows
sudden variations in the
room temperature.
There is electrical noise near a
probe cable.
Isolate the probe cables from all high
voltage sources. Do not route probe
cables and other power cables through
the same electrical knockout. Do not run
probe cables next to other power cables.
When crossing other power cables, cross
at 90°.
The wiring is incorrect.
Be sure that each variable speed fan is
properly connected to the corresponding
VARIABLE STG1 & STG2 terminals.
Each fan requires two wires to be
connected.
The stage 1 and 2 fuse is
blown.
Replace the fuse.
The minimum speed is too low.
Adjust the minimum speed to a higher
value.
The stage 1 or 2 variable
speed fan is not running.
The fan motor is defective.
Check if the motor is defective by
connecting it to an alternate power supply.
If it still is not operating, replace the motor.
RAY DOT
Ventilation Control
Page
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