58
SUZ-KA25VA(H) SUZ-KA35VA(H)
CHANGE IN DEFROST SETTING
<JS> When the JS wire of the outdoor Inverter P.C. board is cut/ soldered, the defrost finish temperature is changed.
(Refer to 12-6-1 SUZ-KA25/35VA(H).TH)
(Refer to 12-6-3 SUZ-KA25/35VA(H)R1.TH)
12
TROUBLESHOOTING
3. Troubleshooting procedure
1) First, check if the OPERATION INDICATOR lamp is blinking on and off to indicate an abnormality. To make sure,
check how many times the abnormality indication is blinking on and off before starting service work.
2) Before servicing check that the connector and terminal are connected properly.
3) If the electronic control P.C. board is supposed to be defective, check the copper foil pattern for disconnection and
the components for bursting and discoloration.
4) When troubleshooting, refer to 12-2. and 12-3.
SUZ-KA25VA(H) SUZ-KA35VA(H) SUZ-KA50VA SUZ-KA60VA SUZ-KA71VA
12-1. Cautions on troubleshooting
1. Before troubleshooting, check the following:
1) Check the power supply voltage.
2) Check the indoor/outdoor connecting wire for miswiring.
2. Take care the following during servicing.
1)
Before servicing the air conditioner, be sure to turn OFF the main unit first with the remote controller, and turn off the breaker.
2) Be sure to turn OFF the power supply before removing the front panel, the cabinet, the top panel, and the electronic
control P.C. board.
3) When removing the electrical parts, be careful of the residual voltage of smoothing capacitor.
4) When removing the electronic control P.C. board, hold the edge of the board with care NOT to apply stress on the
components.
5) When connecting or disconnecting the connectors, hold the housing of the connector. DO NOT pull the lead wires.
Housing point
Lead wire
11
SERVICE FUNCTIONS
Discharge temperature thermistor
Indoor pipe temperature thermistor
Defrost thermistor
Fin temperature thermistor
Ambient temperature thermistor
Outdoor heat exchanger temperature
Purpose
Protection
Cooling: Coil frost prevention
Heating: High pressure protection
Heating: Defrosting
Protection
Protection
Cooling: High pressure protection
Compressor LEV
Outdoor
fan motor
4-way
valve
Sensor
Actuator
SUZ-KA50VA/VA1/VAR2.TH SUZ-KA60VA/VA1/VAR2.TH SUZ-KA71VA/VA1.TH
Jumper wire
Defrost fi nish temperature
SUZ-KA25VA SUZ-KA25VAH SUZ-KA35VA SUZ-KA35VAH
JS
Soldered (Initial setting) 5 °C 8 °C 10 °C 13 °C 10 °C
None (cut) 8 °C 15 °C 13 °C 15 °C 13 °C
Serial No. — ~9XP00121 — ~67P00330 68P00331~
Jumper wire
Defrost fi nish temperature
SUZ-KA25VA SUZ-KA25VAH SUZ-KA35VA SUZ-KA35VAH
JS
Soldered 8 °C
None (Initial setting) 15 °C
Serial No. 9YP00122~
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