Ideal Air 700500, Installation & Operation Manual

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35
Troubleshooting Guide
E 6
ANT I-FROSTING IN
COOLING
MODE,ANT I-OVERHE
ATING IN HEAT ING
MODE
A. Check if indoor unit fan motor is operating;
B. Check if unit is in the cooling mode when ambient
temperature is too low; or is in the heating mode when
ambient temperature is too hot; C. Check if the resistance
data of indoor unit fan coil temperature sensor is correct
according to resistance data table of sensors in this manual.
E 7
PG FAN MOTOR
SPEED
MALFUNCTION
A. Check the connection of PG fan motor on the indoor
unit PCB at location CN7& CN1,
If connection is good, then change the PG fan motor, if unit
still displays error code E7, change the indoor unit PCB.
E 8
SINGAL
COMMUNICATION
BETWEEN INDOOR
AND OUTDOOR UNIT
FAILURE
A. Check the wiring sequence between indoor unit and
outdoor unit, if wired incorrect this will cause damage to the
PCB for both indoor unit and outdoor unit; B. Check the
status of LED4 lamp on outdoor unit main PCB, if it’s dark or
flashing, check the wiring on outdoor unit main PCB, if
wiring is correct, change the outdoor unit main PCB; C. if
LED4 lamp is lit, change indoor unit PCB; D. If step C does
not work, change outdoor unit main PCB.
E 9
INVERTER
MODULAR BOARD
FAILURE
A. Check the voltage of input AC power is correct; B. Check
the wiring on outdoor unit main PCB is correct, or loose; C. If
step A & B are passed but unit is still not functional, change
the inverter modular board; D. if step C does not work, then
change the outdoor unit main PCB.
E b
OUTDOOR UNIT
DISCHARGE GAS
PIPE TEMPERATURE
SENSOR FAILURE
A. Connection location on outdoor unit main PCB is: CN15
PO\PG\PQ for 12kbtu/18kbtu/ 24kbtu/36kbtu, PO is for
outdoor ambient temperature sensor, PG is for outdoor fan
coil temperature sensor, PQ is for outdoor unit discharge
gas temperature sensor. Replace with new sensor; B. after
step A, if unit still displays error code Eb, change the
outdoor unit main PCB.