SiUS281811EA Field Settings from Outdoor Unit
Part 5 Field Settings and Test Operation 183
2.9 Check Operation
To prevent any trouble in the period of installation on site, the system is provided with a test
operation mode enabling check for incorrect wiring, stop valve left in closed, coming out (or
misplacing with suction pipe thermistor) or discharge pipe thermistor and judgment of piping length,
refrigerant overcharging, and learning for the minimum opening degree of electronic expansion
valve.
Unit stopping
Press the TEST button for 5 seconds.
10 seconds to 10 minutes
LED display (H1P~H7P) (
k: ON h: OFF l: BLINK)
hhkhhhh
hlhhhhk
Pressure equalizing
Step 1
20 seconds to 2 minutes
10 minutes
3 minutes
15 minutes
hlhhhkh
Cooling start control
Step 2
hlhhhkk
hlhhkkk
Stability waiting operation
Step 3
Refrigerant overcharge judgment
Step 7
• Stop valve close check
• Wrong wiring check
• Piping length check
hlhhkhh
hlhhkhk
hlhhkkh
Judgment function
Step4~6
5 seconds
hlhkhhk
hlhkhkh
Pump down residual operation
Step 8
2 minutes
Standby for restarting
Completion
Step 9
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