Indoor Unit Drain Pump Error; Indoor Unit Controller Pcb Circuit Float Switch; Check Drain Pipe Installation; Check Drain Pipe Blockage - Fujitsu Airstage VR-II Series Service Manual

Trouble shooting 26
INDOOR UNIT Error Method:

Indoor unit Drain pump Error

Detective Actuators:
Indoor Unit Controller PCB Circuit
Float Switch
Forecast of Cause : 1. Drain Installation 2. Drain pipe line blockage 3. Float switch defective 4. Shorted connector/wire
5. Controller PCB defective / Drain pump defective
Check Point 1 : Check Drain pipe installation
Check Drain pipe installation (Refer to the installaion manual)
The Height limit for Drain pump, The angle of drain pipe, The angle of indoor unit
OK
Check Point 2 : Check Drain pipe blockage
Check Drain pipe line blockage
The drain pump inlet and outlet, The connecting pipe, The drain pipe outlet
OK
Check Point 3, 4 : Check Float Switch operation, connecting wire shorted.
Check operation of float switch.
Remove Float switch and check ON/OFF switching operation
by using a meter.
>>If Float switch is defective, replace it.
OK
Check Point 5 : Check controller
Measure power supply (AC208- 230V) for the drain pump on the Power supply PCB (CN106) at the Float SW ON states.
>>If No voltage on the connector, replace the power supply PCB
>>If AC208- 230V on the connector, replace the Drain pump
Indicate or Display:
E53. 1
Outdoor Unit : E.5 U.1
Indoor Unit : Operation LED 5 times Flash, Timer LED 3 Times Flash,
Error Code
Detective details:
When Float switch is ON for more than 3 minutes.
PCB defective / Drain pump defective
Filter LED Continuous Flash.
: 5 3
ON
04-35
OFF