7 FINAL INSTALLATION CHECKS
Check and Test Operation
For R410A, use the leak detector exclusively manufactured for HFC refrigerant (R410A, R134a, etc.).
*The conventional leak detector for HCFC refrigerant (R22, etc.) cannot be used because its sensitivity for HFC refrigerant lowers to approx. 1/40.
•Pressure of R410A is approx. 1.6 times higher than that of R22.
If installation work is incompletely finished, a gas leakage may occur when pressure rises during operation.
Therefore, be sure to test the piping connections for leakage.
•Check gas leakage at the flare nut connections, valve stem cap connections and service port cap fittings with a leak detector or soap water.
Valve cover
Piping cover
Check points of outdoor unit
Flare nut connections (Indoor unit)
Useful Functions (SM800AT-E only)
Self-Diagnosis by LED Indication
In addition to the code checking by remote controller of the indoor unit, troubles of the outdoor unit can be diag- nosed by LED indications on the cycle control P.C. board of the outdoor unit. Utilize them for various checks. For the check by remote controller of the indoor unit, refer to the Installation Manual of the indoor unit.
Before a check, confirm each bit of the DIP switch is set to OFF position.
LED indication and code checking
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| ¡ | l | l | l | Heat exchanger sensor (TE) error |
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| l | l | ¡ | l | Suction sensor (TS) error |
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| ¡ | ¡ | l | l | Discharge sensor (TD) error |
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| l | ¡ | l | l | Outdoor temperature sensor (TO) error |
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| ¡ | ¡ | ¡ | l | DC outside fan error |
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| ¡ | l | l | ¡ | Communication error between IPDU |
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| l | ¡ | ¡ | l | Discharge temp. error |
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| ¡ | ¡ | l | ¡ | EEPROM error | ||
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| l | l | ¡ | ¡ | Communication error between IPDU |
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| l | ¥ | l | l | Detect circuit error |
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| ¥ | ¥ | l | l | Current sensor error |
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| l | l | ¥ | l | Comp. lock error |
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| ¥ | l | ¥ | l | Comp. break down |
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| l | l | l | ¥ | Phase missing detection, Detection of |
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| l | ¡ | l | ¡ | Serial communication error by thermo. operation of Comp. case |
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LED
indication
D800¡ : Red
D801¡ : Yellow
D802¡ : Yellow
D803¡ : Yellow
¥: Rapid flash l : Go off
¡ : Go on
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