Appendix
Troubleshooting
Refrigerant circuit
<Table 10>
SYSTEM FAULTS
Head Pressure Too High
Head Pressure Too Low
Suction Pressure Too High
Suction Pressure Too Low
I.D. Coil Frosting
Compressor Runs Inadequate or
No Cooling
SYSTEM FAULTS
Head Pressure Too High
Head Pressure Too Low
Suction Pressure Too High
Suction Pressure Too Low
I.D. Coil Frosting
Compressor Runs Inadequate or
No Cooling
SYSTEM FAULTS
Head Pressure Too High
Head Pressure Too Low
Suction Pressure Too High
Suction Pressure Too Low
I.D. Coil Frosting
Compressor Runs Inadequate or
No Cooling
C: Cooling
RES: Restriction
Rooftop_ODM_IBIM_EN_2020001B8001.indd 36
WHAT TO CHECK
INEFFICIENT COMP.
MODE
C
C
C
C
C
C
EXCESSIVE EVAP.
NONCONDENSABLES
LOAD
P
P
S
RES. I.D. AIRFLOW
P
P
P: Primary Causes
DEF: Defective
ENGLISH-36
REF. UNDERCHARGE
S
P
S
P
P
S
P
RES. O.D. AIRFLOW
S
P
S
S
REF. CIR. RESTRICTIONS
S
S
S
S
S: Secondary Causes
REF: Refrigerant
REF. OVERCHARGE
P
P
O.D. AIR
RESTRICTIONS
S
S
CHECK VALVE LEAKING
P
P
S
O . D : Outdoor
2014-06-11 오후 8:07:25