Diagnosis For High Temperature, Overload Protection - Toyotomi GAN-A135GVR-T3 Service Manual

Y
De-energize the unit
and wait for 20min
Replace the control board(replace the outdoor
control board in cooling mode, replace the
indoor control board in heating mode)
High temperature,
overload protection
If the outdoor
ambient temperature is higher than 53 ºC in
cooling mode?/if the ambient temperature of indoor
and outdoor unit is too high?
N
If the radiating of outdoor
and indoor unit is well?
N
If the indoor and outdoor
fan work well?
Y
check if the tube temp sensor is normal
according to the resistance sheet(check
outdoor tube temp in cooling mode, check
indoor tube temp sensor in heating mode)
Is the tube temp sensor normal?
N
Replace the tube
temperature
sensor
End
Normal protection, please use it
Y
after improving ambient temperature
of indoor and outdoor unit
Improve the radiating
Y
environment of the unit
1. Check if fan terminal
OFAN is connected well
2. Test if the motors of
N
indoor and outdoor unit are
broken
Replace fan
capacitor C1
Replace
outdoor fan