Freeze Prevention; Drain Pump Control - Sanyo C1852 Service Manual

10. PROCESSES AND FUNCTIONS
(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
30 F
COMPRESSOR
OUTDOOR FAN
INDOOR FAN
(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
ON
ON
ON ON
OFF
OFF
ON
ON
ON OFF
10 MINUTES
ON
OFF
ON
OFF
SET SPEED
OFF
20 MINUTES
OFF
ON
OFF
SET SPEED
– 28 –
FREEZE
PREVENTION
6 MINUTES
(THERMO ON)
(THERMO OFF)
OFF
OFF
Fig. 9
ON
ON
ON
0609_X_S
Fig. 10
ON
ON
1029_X_S
SM830079