GB - 11
38VYX050/38VYX080
E N G L I S H
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.
Piping cover
Check points
of outdoor unit
Flare nut
connections
(Indoor unit)
Valve cover
LED indication
Cycle control
Cause
P.C. board
LED indication
D800
D801
D802
D803
Heat exchanger sensor (TE) error
Suction sensor (TS) error
Hot gas discharge sensor (TD) error
D800 O:
Red
High-pressure protection error
D801 O:
Yellow
Outdoor air temperature sensor error (TO)
D802 O:
Yellow
Outdoor motorised fan error DC
D803 O:
Yellow
Communication error between IPDU (Abnormal stop)
High-pressure release operation
: Flashing
Discharge temp. error: hot gas is too high
: Off
EEPROM error
: On
Communication error between IPDU (No abnormal stop)
G-Tr short-circuit protection
Detect circuit error
Current sensor error
Comp. lock error
Comp. break down
LED indication and code checking
• 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.
Useful Functions (38VYX080 only)
Self-Diagnosis by LED Indication
Troubles of the outdoor unit can be diagnosed 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 outdoor unit.
Before a check, confirm each bit of the DIP switch is set to OFF
position.
