Figure 7-1 Legend - Carrier 69NT40-511-300 Operation And Service

SYMBOL DESCRIPTION (Schematic Location)
AMBS AMBIENT SENSOR (E- -19)
BM BYPASS MODULE (D- -20)
CB1 CIRCUIT BREAKER - - 460 VOLT (J- -1)
CB2 CIRCUIT BREAKER - - AUTO TRANSFORMER (D- -1)
CCH CRANKCASE HEATER (T- -2)
CF CONDENSER FAN CONTACTOR (M- -10, P- -6)
CFS CONDENSER FAN SWITCH (L- -10)
CH COMPRESSOR CONTACTOR (G- -6, P- -1)
CI COMMUNICATIONS INTERFACE MODULE (A- -3)
CL COOL LIGHT (H- -6)
CM CONDENSER FAN MOTOR (T- -6)
CP COMPRESSOR MOTOR (T- -1)
CPT CONDENSER PRESSURE TRANSDUCER (H- -20)
CPDS COMPRESSOR DISCHARGE SENSOR (C- -19)
CPSS COMPRESSOR SUCTION SENSOR (E- -19)
CR CHART RECORDER [TEMPERATURE RECORDER]
(Figure 7-4)
CS CURRENT SENSOR (M- -2)
DHBL DEFROST HEATER - - BOTTOM LEFT (T- -5)
DHBR DEFROST HEATER - - BOTTOM RIGHT (T- -5)
DHH DRAIN HOSE HEATER (L- -14)
DHML DEFROST HEATER - - MIDDLE LEFT (T- -5)
DHMR DEFROST HEATER - - MIDDLE RIGHT (R- -5)
DHTL DEFROST HEATER - - TOP LEFT (T- -5)
DHTR DEFROST HEATER - - TOP RIGHT (R- -5)
DL DEFROST LIGHT (M- -13)
DPH DRAIN PAN HEATER (R- -5)
DPT DISCHARGE PRESSURE TRANSDUCER (L- -20)
DTS DEFROST TEMPERATURE SENSOR (D- -19)
DVM DUAL VOLTAGE MODULE (E- -1)
DVR DUAL VOLTAGE RECEPTACLE (F- -2)
E1 EVAPORATOR FAN CONTACTOR #1 [HIGH]
(P- -8, H- -11, J- -11)
E2 EVAPORATOR FAN CONTACTOR #2 [HIGH]
(J- -11, K- -11, P- -10)
EB EMERGENCY BYPASS SWITCH (L- -8)
ED EMERGENCY DEFROST SWITCH (E- -5, E- -12, E- -13)
EDL EMERGENCY DEFROST LIGHT (L- -12)
EF EVAPORATOR FAN CONTACTOR [HIGH]
(M- -11, P- -8, P- -9, P- -10)
EM EVAPORATOR FAN MOTOR (T- -8, T- -10)
ES EVAPORATOR FAN CONTACTOR [LOW]
(M- -12, R- -8, R- -10)
F FUSE (D- -5)
FCR FUSE - - CHART RECORDER (Figure 7-4)
FDH FUSE - - DRAIN LINE HEATER (E- -14)
FED FUSE - - EMERGENCY DEFROST (E- -5)
FH FUSE - - HUMIDITY (Figure 7-4)
FT FUSE - - TransFRESH (Figure 7-4)
HA HUMIDITY ATOMIZER (Figure 7-4)
HHT HOSE HEATER THERMOSTAT (J- -14)
HM HOUR METER (H- -6)
HPR HUMIDITY POWER RELAY (Figure 7-4)
HPS HIGH PRESSURE SWITCH (J- -7)
HPT HUMIDITY POWER TRANSFORMER (Figure 7-4)
HR HEATER CONTACTOR (M- -13, P- -3)
T-285
LEGEND
SYMBOL
HS HUMIDITY SENSOR (G- -20)
HST HOSE HEATER SAFETY THERMOSTAT (G- -14)
HTT HEAT TERMINATION THERMOSTAT (F- -12)
HWH HUMIDITY WATER HEATER (Figure 7-4)
HWP HUMIDITY WATER PUMP (Figure 7-4)
IC INTERROGATOR CONNECTOR [FRONT/REAR]
(T- -19, T- -20)
IP INTERNAL PROTECTOR (F- -7, H- -10)
IRL IN RANGE LIGHT (M- -15)
MDS MANUAL DEFROST SWITCH (H- -15)
PDR PUMP DIRECTION RELAY (Figure 7-4)
PE PRIMARY EARTH (J- -2)
PR PROBE RECEPTACLE [USDA]
(F- -19, M- -20, N- -20, P- -20)
RM REMOTE MONITORING RECEPTACLE
(H- -6, L- -13, L- -15)
RRS RETURN RECORDER SENSOR (D- -19 or M17)
RTS RETURN TEMPERATURE SENSOR (D- -19)
S1 EVAPORATOR FAN CONTACTOR #1 [LOW]
(G- -11, J- -11, R- -8)
S2 EVAPORATOR FAN CONTACTOR #2 [LOW]
(J- -11, K- -11, R- -10,)
SD STEPPER MOTOR DRIVE (C- -20)
SMV SUCTION MODULATING VALVE (A- -20)
SPT SUCTION PRESSURE TRANSDUCER (K- -20)
SRS SUPPLY RECORDER SENSOR (L- -20)
ST START - - STOP SWITCH (L- -4)
STS SUPPLY TEMPERATURE SENSOR (C- -20)
TBU TRANSFORMER BRIDGING UNIT
TC CONTROLLER RELAY - - COOLING (K- -7)
TCC TransFRESH COMMUNICATIONS
CONNECTOR (Figure 7-4)
TD CONTROLLER RELAY - - WATER
PUMP/ATOMIZER (Figure 7-4)
TE CONTROLLER RELAY - - HIGH
SPEED EVAPORATOR FANS
(FIG 7- -2 = K- -11, FIG 7- -3 = G- -11)
TF CONTROLLER RELAY - - DEFROST (D- -14)
TFC TransFRESH CONTROLLER (Figure 7-4)
TH CONTROLLER RELAY - - HEATING (K- -13)
TI CONTROLLER RELAY - - IN RANGE (K- -5) OR
WATER PUMP REVERSE (Figure 7-4)
TN CONTROLLER RELAY - - CONDENSER FAN (K- -10)
TP TEST POINT (E- -15, E- -17, G- -10, J- -10, K- -7, K- -13,
M- -15, FIG 7- -4 & FIG 7- -2 = K- -11, FIG 7- -3 = F- -11)
TQ CONTROLLER RELAY - - WATER TANK HEATER
(Figure 7-4)
TR TRANSFORMER (M- -3)
TRANS AUTO TRANSFORMER 230/460 (D- -3)
TRC TransFRESH REAR CONNECTOR (Figure 7-4)
TS CONTROLLER RELAY - - NOT USED (D- -15)
TV CONTROLLER RELAY - - LOW SPEED EVAPORATOR
FANS (FIG 7- -2 = K- -12, FIG 7- -3 = G- -12)
VPS VENT POSITION SENSOR
WH WATER HEATER RELAY (Figure 7-4)
WHTT WATER HEATER TERMINATION THERMOSTAT
(Figure 7-4)
WP WATER PRESSURE SWITCH (F- -10)

Figure 7-1 LEGEND

7-2
DESCRIPTION (Schematic Location)