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9 OPERATION CHECK-UP
• Cooling Startup
1. Turn thermostat to OFF and turn power to ON
2. Turn ON thermostat and set as high as possible
3. Turn Fan switch ON and indoor blower should run
4. Turn fan switch to AUTO, system switch to COOL
and thermostat tem perature setting below room
temperature.
Unit should run in COOLING mode.
• Heating Startup
After normal cooling run
1. Turn thermostat switch to HEAT. After unit stops,
wait about 5 minutes.
2. Turn thermostat setting above room temperature.
Unit should run in HEATING mode.
After unit has run for a while, check the following:
1. Are fans running properly?
2. Is compressor running correctly?
3. Check refrigerant charge.
4. Check duct connection for leaks.
5. Check for tubing and sheet metal rattles.
(See Wiring Diagram for electric connection detail.)
10 TROUBLE SHOOTING
WARNING
Component trouble shooting requires opening
control box with power on.
Use extreme care while working on this
condition. Check nameplate and this instruction
when making wire connections.
10.1 Fault Code of Motor Driver
Module
LED1 ERROR CODE
STEADY ON
0
OFF
2s ON
KEEP
2s OFF
FLASHING
0.2s ON
0.2s OFF
1FLASH/CYCLE
1
2
2FLASH/CYCLE
3FLASH/CYCLE
3
4FLASH/CYCLE
4
5FLASH/CYCLE
5
6FLASH/CYCLE
6
10.2 Fault Code of Main Control
Module
LED2 ERROR CODE CONTENT
STEADY ON
0
OFF
1FLASH/CYCLE
1
2FLASH/CYCLE
2
3FLASH/CYCLE
3
5FLASH/CYCLE
5
6FLASH/CYCLE
6
22
CONTENT
NORMAL OPERATION
POWER SUPPLY FAILURE
STANDBY
INTER INTEGRATED CIRCUIT
COMMUNICATION ERROR
MOTOR CURRENT ERROR
INVERTER MODULE
TEMPERATURE ERROR
DC BUS VOLTAGE ERROR
MOTOR PARAMETER ERROR
MOTOR STARTUP FAILURE
PHASE SEQUENCE ERROR
NORMAL OPERATION
POWER SUPPLY FAILURE
T3 SENSOR FAILURE
T4 SENSOR FAILURE
LPC OPEN
OFM FAILURE
NO MACHINE TYPE
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