Product data

HWError Code.doc MORE ON NEXT PAGE 2/09/01
Troubleshooting
Failure Check/Action
Fan coil doesn’t receive signal
from remote. No BEEP heard
from fan coil. Unit runs in
TEST mode.
• Check plug connection at receiver board and main board(CN12)
• Check remote for signal transmission indicator
• Operate remote directly in front of unit
Replace batteries
Remote failure – if available try another remote - replace
Receiver board failure - replace
Unit BEEPS continuously
Replace main PCB
System does not operate in Test,
Emergency or Remote mode.
Green power light is not on and
LED on main circuit board is
not blinking.
• Check power supply to indoor fan coil and main circuit board
• Check fuse on main circuit board
If there is power to the main board and LED is not blinking replace
main
board.
Indoor fan coil operating but
outdoor unit does not.
• Check power supply
• Check control wiring at indoor and outdoor TB for relay signal output
If there is no signal at indoor TB replace main circuit board.
If there is a signal at outdoor TB check compressor contactor.
Indoor fan motor noise
• Check blower assembly for being out of balance.
•
Check fan motor bearings and wheel bearings for damage.
Realign blower wheels if apparent source of noise.
Replace parts as required.
Air sweep not working or
movement is radical.
• Check wiring connection of motor to main circuit board (CN14 for 9 &
12, CN13 & CN14 for 18 & 24 size units.
If connection is secure replace appropriate step motor.
115V units not starting up on
initial installation.
• Check power source to insure lines are in phase.
Make correction if power lines are out of phase.
Steady flashing of green light
with no fault code indication
• Check plug connections on main circuit board
Fan coil does not power up
• Check wiring connections and power supply
• Check for voltage at fan coil TB
• Check fuse if LED on main board is not flashing
• Check plug connection at CN1(main board)