Malfunction Analysis - Friedrich PTAC ZONEAIRE SELECT Service & Parts Manual

Malfunction Analysis

Malfunction
Start Failure
Control panel do not work
Indoor fan/outdoor fan does not func-
tion or run slowly
59
TROUBLESHOOTING
Possible Reasons
power line broken, units without power
supply
Power cord protection trip
Power cord not plugged in correctly
PCB fuse broken
Bad connection between main board
and control panel
Compressor delay start
Power fail protection
Unit in protection mode
Main board or Control panel broken
When switching to 24V remote thermo-
stat, the control panel will not function.
Fan is locked by something or the
power wires are not correctly connect-
ed; fan capacitor terminals loose; fan
capacitor is out of service life
How to solve
"Check the indicator LED on the LCID
power head, and it should be lit up ;If
not, push the RESET button, if no volt-
age stll, but power grid has
output, you need to change the power
cord." See figure 701
"Check the power cord .If damaged,
replaced. If no damage noted, push
the RESET button. If still not solved,
replace the power cord."
Seat plug correcly..
"Check if any load (in fan, out fan, re-
versing valve, power transformer) has a
short circuit. Eliminate the
error and replace the fuse with the
same type."
Check connecting wires, making sure
all areconnected well.
If it's normal, compressor will start
after 3 minutes.
"When power on, because of auto-
restart, unit will delay starting in
120~240s"
Please check the ERROR CODE.
Replace main board or control panel.
"If you need to use control panel to take
control, you need to switch the control
mode. See Switch Over Between 24V
Remote Thermostat and Control Panel
in the advanced settings section."See
Figure 702
Disconnect the power cord, check
whether the fan can run smoothly by
hand or other tools or whether motor
wire is fixed well. If fan runs slow,
replace capacitor..