Fan Motor, Motor Driver Abnormal Stop Protection; Eev Coil Abnormal Stop - Fujitsu Airstage VR-II Series Service Manual

2-9-10 Fan Motor, Motor Driver abnormal stop protection

Detect
Protective function
device
Embeded
Fan Motor lock
device
protection stop
Embeded
Fan Motor
device
temperature
protection stop
Embeded
Fan Motor driver
device
protection stop

2-9-11 EEV Coil abnormal Stop

Protective function Detect device
Indoor unit EEV Indoor unit
coil abnormal Controller
Stop PCB EEV
drive Circuit
Outdoot unit Outdoor unit
EEV coil 1,2,3 Controller
abnormal Stop PCB EEV
drive Circuit
Cool Heat Display Start condition
E97. 1 1. When the outdoor fan rotation speed is
less than 100rpm in 20seconds after
fan motor starts.
2. After the fan motor restarts, and when
the condition 1 is repeated consecutively
4 times.
E97. 5 1. When the FAN motor failed the operation
more than 470rpm.
2. After the fan motor restarts, and if the fan
motor cannot operate at 470rpm or more,
or the condition 1 is repeated
consecutively 3 times within 60 minutes.
When the Driver PCB detects the following
E97. 9
abnormalities,
Driver PCB defective, Fan motor defective
(short circuit), Main PCB defective (DC
output abnormal), lose connection, or
Disconnecting wire.
Cool Heat Display
Error on IU.
LED blinks
Operation 5 times
Timer 2 times
Error on OU.
7-Seg display
E9A"X"
Coil No, "X"
Start condition Release condition
When the EEV
Drive circuit detects
coil drive circuit
normal condition
is open circuit
and Power reset
02-23
Operation
Release condition
Error reset (push Fan Motor and
button SW) Compressor Stop
executed after Error indication
power turned on
Operation
System Stop
Error indication
"I.U Coil 1 Error"
System Stop
Error indication
"CoiX1 Error"
Coil No, "X"