Service & Parts Manual (2019, 2020, 2021, 2022)

55 PB
COMPONENTS TESTING
Electronic Control Board Identication
HPS
HEATER
RELAY
FAN 1
RELAY
FAN 2
RELAY
FAN 3
RELAY
L1
N/L2
AMB TEMP SENSOR
ID COIL TEMP SENSOR
OD COIL TEMP SENSOR
DISCH AIR TEMP SENSOR
HIGH PRESSURE
SWITCH/JUMPER
COMP
RELAY
HEATER
RELAY
FAN 4
RELAY
(
LOW SPEED
FAN
MED SPEED
FAN
HIGH SPEED
FAN
MAX SPEED FAN
COOLING ONLY MODELS
IF INSTALLED ON
MODELS WITH HEAT THIS
IS A POWER RELAY
COMPRESSOR
POWER
L1 POWER
115 OR 230
N / L2
L1 HEATER POWER
L2 HEATER POWER
USER INTERFACE
GROUND
Reversing
Valve Relay
L2 / RV2
L2 / RV2
RV1
Figure 707 (Electronic Control Board Identication)