Freeze Prevention; Drain Pump Control - Sanyo SPW-X253G56 Service Manual

2-2 Freeze Prevention

Freeze Prevention keeps the indoor heat exchange coil from freezing. Freezing reduces
the efficiency of the unit, and frost buildup on the coil blocks cool air circulation from the
indoor unit's fan.
MORE THAN 10 MINUTES
INDOOR COIL
TEMPERATURE
–1°C
COMPRESSOR
OUTDOOR FAN
INDOOR FAN

2-3 Drain Pump Control

Drain pump operates when compressor starts to operate or when Float Switch turns off.
FLOAT SWITCH
ON: low water level
OFF: high water level
COMPRESSOR
DRAIN PUMP
OUTDOOR FAN
INDOOR FAN
FREEZE
PREVENTION
6 MINUTES
ON OFF
ON OFF
ON
ON ON
OFF
ON OFF
ON
ON OFF
SET SPEED
– 31 –
2. Processes and functions
FREEZE
PREVENTION
10 MINUTES 6 MINUTES
(THERMO OFF)
ON OFF
ON
OFF
SET SPEED
OFF ON
20 MINUTES
OFF ON
ON
ON
OFF
(THERMO ON)
ON
ON
0608_X_S
Fig. 7
0609_X_S
Fig. 8
SM830042
2