Heat Pump Defrost Circuit Board Specifications:
Input
Control Voltage: 18-30 VAC
Frequency: 50/60 Hz
Power Consumption: 1 watt maximum
Output
Type: Maximum Relay
Form: SPST, normally open
Rating: 2 amps
Time Delay
Defrost Time: 10 minute fixed +/- 5%
Interval Time: pin selectable 30/60/90 minute
Power On Reset Time: 500 milliseconds
Test Time: Short Across Test Terminals-reduced test time 256x
Mode of Operation:
Provides a selectable time interval between defrost cycles.
It will allow heat for the selected 30/60/90 minute period and provide a 10 minute defrost.
A hold input permits the timer to accumulate time only while the compressor is running.
Additionally, a warm coil causes the disc sensor to open which will prevent time accumulation or end in an in-progress defrost period.
When the defrost period ends either by opening the DFT or after the 10 minute defrost period has elapsed, the timer is reset.
Lennox Heat Pumps
Description: Defrost control used on many Lennox Models: CHP16-6535Y,HP22-411-1P, HP25-311-1P, HP19, HP22, HP24, HP23, 10HP, HP25, and HP26 series.
Replaces Circuit Board Part Numbers:
DT2-1004
1093410
SPCB1
78H68
78H6801
B12-999
7221018-100
DT1-101101-1LX
85H75
85H7501
CAR85H75
CARICM307C
DT2-1004H-1HQ
DT2-100411-1HQ
ICM307C
DT-2
ICM-307C
1093410
DT2-1004
CNT03721
CNT3721
85H7501
ICM307
SPCB-1
SPCB-1
PCB712-2A
CARICM307.
Used in Equipment Models:PHAD30N1K2, PHAD24N1K2, PHAD47N1K1, PH5042AKB4.
Used in Air Conditioning and Heating Brands: Airquest, Arcoair, Clare, Comfortmaker, Heil, Kenmore, Tempstar, Snyder General, Intercity Products, Whirlpool.
Used in ICP Equipment Models:
H6P024A3Y2
H6P030A3Y2
H6P036A3Y2
H6P042A3Y2
H6P048A3Y1
H6P060A3Y1
H6S518A3V
H6S524A3V
H6S530A3V
H6S536A3V
H6S542A3V
PH5024AKB4
PH5030AKB4
PH5036AKB4
PH5042AKB4
PH5048AKB1
PH5060AKB1
PHA036N1HA
PHA042N1HA
PHA048N1HA
PHA060N1HA
PHAD24N1K1
PHAD24N1K2
PHAD30N1K1
PHAD30N1K2
PHAD36N1K1
PHAD36N1K2
PHAD42N1K1
PHAD42N1K2
PHAD47N1K1
PHAD47N1K2
PHAD60N1K1
PHAD60N1K2
PHAD60N1K3
PHB036N1HA
PHB036N1LA
PHB042N1HA
PHB042N1LA
PHB048N1HA
PHB048N1LA
PHB060N1HA
PHB060N1LA
PHRA47N1K1
PHRA47N1K2
PYHB48G1
PYMC24G1
PYMC24G2
PYMC30G1
PYMC30G2
PYMC36G1
PYMC36G2
PYMC42G1
PYMC42G2
PYMC48G1
PYMC48G2
PYMC60G1
PYMC60G2
PYMD36FA
PYMD36H1
PYMD36HA
PYMD42FA
PYMD42H1
PYMD42HA
PYMD48FA
PYMD48H1
PYMD48HA
PYMD60FA
PYMD60H1
PYMD60HA