Bryant SM03-4 Скачать руководство пользователя страница 9

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8. T1, T2 and T3 are connections for the primary, high-voltage

side of the transformer.

9. The fan relay is controlled by the thermostat and turns the

fan on and off.

10. A plug is used as the connection for the PCB power and

electric heaters. Note the pin numbers on the plug.

11. Diodes provide DC power for the fan relay and the first

stage of electric heat: W2, W3 or E.

II.

PCB COMPONENT FUNCTIONS

Low-Voltage Terminal Board

The low-voltage terminal board connects the indoor thermostat to
the outdoor unit as shown in Fig. 8. The terminals are listed as
follows along with their functional control.

1. R is used to connect the secondary side of the transformer.

The red wire provides low voltage (24v) to the PCB and the
thermostat. R is fused on the HK61GA003 board.

Fig. 6—HK61GA001 Printed-Circuit Board

A97025

2FC-1

AUX1

AUX2

DUMMY

COMMON

240 VAC

TRANSFORMER

AC LINE

FAN

RELAY

24VDC

FAN

EAC2

EAC1

HK61GA001A

W2-3

W2-E

5 AMP

FUSE

MAX

TDB

LOW VOLTAGE
TERMINAL BOARD

2ND STAGE

3RD STAGE

NOT USED

FUSE
(LOW VOLTAGE)

CONNECTIONS
FOR VARIOUS
ACCESSORIES

FAN CONNECTIONS

ELECTRONIC AIR
CLEANER CONNECTIONS

ELECTRIC HEAT
BREAKOFF TABS
FOR STAGING

HK61GA001

PLUG

INTERLOCK

DIODES

TRANSFORMER

CONNECTIONS

—9—

Содержание SM03-4

Страница 1: ...Troubleshooting PCB 32 Troubleshooting ICM2 34 Condensed Version of Troubleshooting FK4C FV4A Motor and Controls 34 Accessories 34 THERMOSTATIC EXPANSION VALVES TXV 35 Problems Affecting TXV 36 PISTO...

Страница 2: ...3A 1 The low voltage stripped leads are used to connect the 24 v side of transformer to indoor thermostat and outdoor section 2 A 5 amp fuse is used to protect the low voltage transformer secondary 3...

Страница 3: ...w 2 Downflow 3 Horizontal 4 Multipoise 5 Upflow Downflow Airflow 018 1 1 2 Ton 024 2 Ton 001 Multi Tons 002 Multi Tons Etc Cooling Size 10th 11th 12th Positions Fan Coil 005 010 Etc Heating Size KW 6t...

Страница 4: ...ultipoise Single Piece FV4ANB 006 Multipose Modular NOTE Multipoise units are approved for upflow downflow and horizontal left and right applications TABLE 2 PSC FAN MOTOR SPEED TAPS MODEL UNIT SIZE N...

Страница 5: ...e in troubleshooting PCB unless otherwise noted A If Fan Will Not Turn On from Thermostat IF THERE IS NO HIGH VOLTAGE TO TRANSFORMER 1 Check plug receptacle connection This supplies power from heaters...

Страница 6: ...voltage transformer needs to be replaced B If Electric Heat Stages Will Not Turn On But Fan Will Turn On IF THERE IS NO HIGH VOLTAGE TO TRANSFORMER 1 Check plug connection between heaters and board T...

Страница 7: ...BLK AND LOW BLU OR RED 12 CONNECT R TO R G TO G ETC SEE OUTDOOR INSTRUCTION FOR DETAILS 13 IF WIRE CRIMP IS REMOVED AN EMERGENCY HEAT RELAY IS REQUIRED SEE OUTDOOR THERMOSTAT INSTRUCTIONS THIS COMPAR...

Страница 8: ...e 5 Use 60 amp class K fuses only for replacement 6 3 speed motor shown Optional 2 speed motor uses HI BLK and LOW BLU or RED 7 Connect R to R Gto G etc see outdoor instruction for details 8 Smaller h...

Страница 9: ...listed as follows along with their functional control 1 R is used to connect the secondary side of the transformer The red wire provides low voltage 24v to the PCB and the thermostat R is fused on th...

Страница 10: ...fan off delay which begins timing when the Y is de energized 5 O is used as a junction for a heat pump reversing valve circuit Fig 7 HK61GA003 Printed Circuit Board A97026 3 6 9 12 2 5 8 11 1 4 7 10 L...

Страница 11: ...be turned on without the fan being turned on at the same time This is a fan interlock system 2 W3 When a signal is sent to W3 2 control signals are sent out to the sequencers a 24 v dc signal to seque...

Страница 12: ...FUSE MAX FAN TDB YEL LS 5 HTR5 BLK BLK 10 9 YEL FU5 FU6 SEQ 3 LS 6 HTR6 BLK BLK 12 11 YEL LS 5 HTR5 BLK BLK 6 5 YEL FU3 FU4 SEQ 2 LS 4 HTR4 BLK BLK 8 7 YEL LS 1 HTR1 BLK BLK BLU MED BLU MED RED LO RED...

Страница 13: ...G RED FR LOW MTR SPD HI MTR SPD FAN COMMON UNUSED LEAD BLK 208 240 VAC COM NO NC F3 F2 L2 F1 O Y R T R A N S F O R M E R A C L I N E T 1 T 2 C O M M O N C O M M O N D U M M Y T 3 L 2 L 1 F 1 F 2 F 3 F...

Страница 14: ...LD POWER WIRING AUX 1 AUX 2 F4 24 VDC RED FR LOW MTR SPD HI MTR SPD FAN COMMON UNUSED LEAD BLK 208 240 VAC NO C HST ORG ORG COM NO NC F3 F2 L2 F1 O Y R T R A N S F O R M E R A C L I N E T 1 T 2 C O M...

Страница 15: ...WIRING FIELD POWER WIRING AUX 1 AUX 2 F4 24 VDC TDR YEL FAN COMMON UNUSED LEAD UNUSED LEAD BLK 208 240 VAC COM NO NC F3 F2 L2 F1 O Y R T R A N S F O R M E R A C L I N E T 1 T 2 C O M M O N C O M M O...

Страница 16: ...NG AUX 1 AUX 2 F4 24 VDC TDR FR ORG ORG RED YEL FAN COMMON UNUSED LEAD LOW MTR SPD HI MTR SPD BLK 208 240 VAC COM NO NC F3 F2 L2 F1 O Y R COM NO NC T R A N S F O R M E R A C L I N E T 1 T 2 C O M M O...

Страница 17: ...MAX AUX2 L1 EAC1 FAN R L G E C O Y W2 INDOOR THERMOSTAT YEL YEL BLK LS 3 HTR3 BLK BLK 6 5 YEL FU1 FU2 FU3 FU4 SEQ 2 LS 4 HTR4 BLK BLK 8 7 YEL LS 1 HTR1 BLK BLK 2 1 YEL SEQ 1 LS 2 HTR2 BLK BLK 4 3 SEQ...

Страница 18: ...the PCB transformer and the fan Make sure the plug is connected properly 2 Check sequencer number 1 and the plug wiring The yellow wire should be connected to pin number 9 of the plug and the limit s...

Страница 19: ...m temperatures cool sufficiently the switch will automatically reset to its closed position Normal failure mode for this switch is open If a limit switch has been determined to be defective NEVER BYPA...

Страница 20: ...w due to dirty filters blocked registers or undersized duct 2 Check blower motor and wheel for proper operation Excessive current draw of motor will cause internal over load to trip 3 The fan speed ma...

Страница 21: ...ied together by jumpers JW1 and JW2 These jumpers are provided for field staging of electric heater banks through use of thermostats When staging is a requirement installer cuts jumpers and wires in t...

Страница 22: ...ses selected taps to modify its operation to a pre programmed table of airflows Airflows are based on system size or mode of operation and those airflows are modified in response to other inputs such...

Страница 23: ...flow supplied for all operational modes except non heat pump heating modes 10 percent and 10 percent respec tively The adjust selection options are provided to adjust airflow supplied to meet individu...

Страница 24: ...option 24 vdc 0 187 X 0 032 M1 Common connection to blower motor T1 Common connection for transformer RED Common to R screw terminal and SEC2 TABLE 4 CONNECTIONS ON SINGLE BARRIER STRIP MOUNTED CROSS...

Страница 25: ...L RECP 3 RECP 4 ICM BRN YEL RED VIO RED ORN BRN VIO ORN GRY BLU BLK BLK 1 9 2 10 3 11 4 12 5 13 6 14 7 15 8 16 PLUG 2 BLK YEL ORN GRN RED BRN VIO SEE NOTE 3 SEE NOTE 2 HPTB E Y1 Y0 W2 O L R NOTES 1 Us...

Страница 26: ...orted or system is trying to draw more VA than transformer rating allows When fuse blows because of high voltage the system has mixed high and low voltage signals 1 Check transformer and thermostat wi...

Страница 27: ...it board terminals AUX1 and AUX2 See Fig 16 This signal is present when either G or W is present and is active in all heating and cooling modes Because 24 vdc relays may not be readily available to in...

Страница 28: ...2 is fed high voltage AC power through the 5 pin connector See Fig 23 The AC power is then rectified to DC by a diode module After rectification DC signal is electronically communicated and fed in seq...

Страница 29: ...se of thermostats When staging is a requirement remove J2 jumper and wire in thermostats as is the common practice with other fan coils To ensure motor operation if any 1 of the inputs is energized mo...

Страница 30: ...operation to a pre programmed table of airflows Airflows are based on system size or mode of operation and those airflows are modified in response to other inputs such as the need for de humidificati...

Страница 31: ...it installed in all operational modes See Fig 24 C System Type The type of system must be selected 1 AC air conditioner 2 HP COMFORT provides lower airflow than air condi tioner selection approximatel...

Страница 32: ...Check low voltage fuse shown in Fig 24 If fuse is blown replace it The transformer cannot supply power to board with fuse blown or loose If fuse blows when unit has power applied to it the system most...

Страница 33: ...WHT PLUG 3 230V 208V Com YEL BLK BLK YEL ICM RECP 4 RECP 3 GRY 1 BRN 12 11 10 9 8 7 6 5 4 3 2 1 5 4 3 2 1 G R N Y E L B L K W H T RED VIO V I O R E D B R N O R N BRN PLUG 1 G R Y 16 15 14 13 12 11 10...

Страница 34: ...continues to run remove all thermostat wires If motor stops check thermostat wiring to thermostat or outdoor unit for shorts or miswire XV CONDENSED VERSION OF TROUBLESHOOTING FK4C AND FV4A MOTOR AND...

Страница 35: ...heat pump systems to adjust to changing load conditions by maintaining a preset superheat temperature at outlet of evaporator coil The volume of refrigerant metered through valve seat is dependent up...

Страница 36: ...place seal ring on retainer 8 Reconnect refrigerant tube to piston body 9 Pressurize tubing and coil then leak check 10 Evacuate tubing and coil as necessary CAUTION Use a backup wrench and do not ove...

Страница 37: ...id and vapor refrigerant tubes and conden sate drain tube Install new liquid line filter drier 20 Evacuate tube set and indoor coil to 500 microns back seat open liquid and vapor service valves 21 Tur...

Страница 38: ...tube from original coil and install it in same position on new coil See Fig 31 12 Place coil assembly in plastic condensate pan and secure using 4 screws through delta plate See Fig 31 13 Horizontal...

Страница 39: ...llow filter to dry No oiling or coating of filter is required New filters are available from your local distributor Place filter in slot with cross mesh binding up or facing cooling coil and replace f...

Страница 40: ...rmer A 40 VA transformer supplies 24 v power for control circuit Check for 208 230v on primary side of transformer If present check for 24v on secondary side NOTE Transformer is fused Do not short cir...

Страница 41: ...LK BLK HTR LS YEL VIO BLK BLK RED BLU TRANS DISCONNECT SEE RATING PLATE FOR VOLTS HZ FIELD POWER SUPPLY CHASSIS GROUND RED VIO ORN BRN BRN CHASSIS GROUND RED ORN T A P2 B BRN BRN 5 6 SEQ CHASSIS GROUN...

Страница 42: ...be a trap in condensate line Trap must be at least 3 in deep not higher than the bottom of unit condensate drain opening and pitched downward to an open drain or sump CAUTION Do not use caustic househ...

Страница 43: ...SFORMER PIGTAILS BLUE 208V RED 230V INSULATE UNUSED LEAD 2 FAN MOTOR PIGTAILS RED LOW BLACK HIGH INSULATE UNUSED LEAD 3 FAN MOTOR THERMALLY PROTECTED 4 SUITABLE FOR USE WITH COPPER OR COPPER CLAD ALUM...

Страница 44: ...ction of this manual C Transformer A 60 VA transformer supplies 24 v power for control circuit Check for 208 230 v on primary side of transformer If present check for 24 v on secondary side Replace tr...

Страница 45: ...every 5 years if motor is used on intermittent operation thermostat FAN switch at AUTO position or every 2 years if motor is in continuous operation thermostat FAN switch at ON position Remove motor...

Страница 46: ...ump signaling control board that heat pump is in defrost g W2T terminal provides input from thermostat signaling for supplemental or emergency heat h W3 terminal provides input from outdoor thermostat...

Страница 47: ...ycle down indoor fan remains on 60 sec to recover heat stored in indoor coil C Defrost The Smart Heat PCB stages the correct amount of supplemental heat during defrost If too much heat is added system...

Страница 48: ...gh speed through terminals F1 and HI The LED indicator on control signals 5 flashes indicating cooling operation The call for cooling signals can be confirmed by placing voltmeter leads across low vol...

Страница 49: ...s sequencer relay terminal 4 of sequencer relay 1 and terminal 4 of limit switch 3 The reading should be 208 230v and heater should be energized If 208 230v is not observed at terminals specified chec...

Страница 50: ...EFERENCE GUIDE FOR INSTALLERS AND TECHNICIANS Puron R 410A refrigerant operates at 50 70 percent higher pressures than R 22 Be sure that servicing equipment and replacement components are designed to...

Страница 51: ...AT E W2 O G Y C R LVTB Yo W3 W2T W2D O G Y C R YEL BLK VIO BRN 7 8 9 6 5 4 1 2 3 YEL YEL YEL SEQ 3 HTR3 3 SEQ1 8 7 4 SEQ2 6 5 SEE NOTE 1 SEE NOTES 2 7 AND 8 YEL COM CAP BRN FM BRN GRN YEL GND BLK HI B...

Страница 52: ...video based formats and materials All include video and or slides plus companion book Classroom Service Training plus hands on the products in our labs can mean increased confidence that really pays...

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