SYMPTOM: The fan will not run in all three
speeds or switches speeds in an improper order.
CAUSE: Incorrect wiring between the thermostat
and the relay board, or between the relay board
and the fan wires.
REMEDY: Recheck the wiring (G=low speed,
G2=medium speed, G3=high speed).
SYMPTOM: Cold water valve opens for either a
cool or a heat demand in a 4-pipe system.
CAUSE: The thermostat has been programmed
for the incorrect type of fan coil.
REMEDY: Confirm that you have entered the
correct programming for your type of fan coil
system (steps #3 and #4, page 11 of the
Owner’s Manual).
SYMPTOM: The water valve does not open at all
in 2-pipe configurations.
CAUSE: The thermostat has been programmed
for the incorrect type of fan coil system or the fan
coil is not wired to the thermostat correctly.
REMEDY: Program the thermostat for a 2-pipe
fan coil (step #3, page 11 of the Owner’s Manual).
Also, make certain that the water valve is wired to
the Y1 terminal.
TROUBLESHOOTING
SYMPTOM: Parts of the thermostat display are
missing.
CAUSE: The thermostat has been programmed
for a minimal display.
REMEDY: Program the thermostat for Full
Display (step #1, page 10 of the Owner’s
Manual).
Page 16
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