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Troubleshooting
1.
Measure the transformer voltage to check if it drops
below 23V while in use. The Model 5000 may not
function properly outside of the 23-28 volt range and
the transformer may need to be replaced.
2.
If applying 24V to 'G' on the Sender activates 'W1'
on the Receiver, or vice versa, then the two wires
that connect the Sender and Receiver are crossed.
Disconnect the thermostat cable and swap the
connections.
3.
At the thermostat, jumper 'R' to 'G' to activate the
fan. Jumper 'R', 'G', and 'Y' to activate the fan and
condenser. Jumper 'R' to 'W1' to activate first stage
heat. Jumper 'R', 'W1', and 'W2' to activate second
stage heat. If all functions work correctly when
jumpered, then the thermostat may not be configured
properly. If no functions operate there may be a break
in the thermostat cable.
4.
If the Receiver is set to the highest voltage possible
and still does not activate the equipment when called,
then the power consumption of the thermostat is too
low. This can be fixed by adding a resistor in parallel
to the thermostat. See 'Low Power Thermostats' for
more information.
Low Power Thermostats: Adding a Resistor
Y
Air Conditioner
Page 2 of 4
G
C
Y
G
Fan
Low Power Thermostats
Some thermostats may not use enough power for the
Model 5000 to operate as intended. A resistor can be
added into the circuit to increase the amount of power
sent to the Receiver, as shown in the diagram below.
A 1000 Ω, 1W resistor is recommended, however similar
resistance values (750-1500 Ω) can be used. Ensure the
wattage of the resistor is 1W or more.
Thermostat
Y
R
C
W2
W1
Added
Resistor
R
W2
W1
Heat 2
Heat 1
24V Transformer
Indoor Unit
Black
Red
Sender
White
Blue
Yellow
Green
Red
Purple
Thermostat
Cable
Receiver
Purple
Red
Yellow
Green
Blue
FAST-STAT
White
Model 5000
Red
Black
C
www.fast-stat.com
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