BDP A 658A Guide de dépannage télécharger pdf

CONTENTS

Page

GENERAL ..................................... 1

COMPONENT DESCRIPTION ...................... 1-5

ICM2 Selection Modes .......................... 1

SEQUENCE OF OPERATION ...................... 5

I. Continuous Fan Operation .................. 5

II. Cooling Mode, 557A and 657A Units ......... 5

III. Cooling Mode, 658A and 589A Units ......... 5

IV. Heating Mode, 658A and 589A Units .......... 5

V. Electric Heat Mode ........................ 5

VI. Heat Pump, Heating with Auxiliary

Heat ..................................... 5

VII. ICM2 Control Power ....................... 5

VIII. Low-Voltage Circuit Fusing ................. 5

IX. Motor Power Connections .................. 5

OPERATING PROBLEMS ......................... 5-7

I. Fan Will Not Turn On from Thermostat ....... 5

II. Fan Will Turn On, but Electric Heat

Stages Will Not ........................... 6

III. Easy Select Board Fuse Keeps Blowing ...... 6

IV. Motor Does Not Run ...................... 7

V. Motor Shaft Does Not Rotate Smoothly ....... 7

VI. Motor Does Not Run Smoothly .............. 7

VII. Motor Does Not Stop Running .............. 7

TROUBLESHOOTING SUMMARY ..................8-16

GENERAL

This manual contains information to assist in troubleshoot-

ing operating problems and errors associated with the

Integrated Control Motor (ICM2). The ICM2 is used in the

units listed in Table 1.

Table 1 — Units With ICM2

UNIT UNIT SIZE

557A 048,060

589A 048,060

657A 048,060

658A 048,060

WARNING: Before performing service or repair op-

erations on unit, turn off main unit power. Electrical

shock could cause personal injury.

COMPONENT DESCRIPTION

The ICM2 (Fig. 1) is powered with high voltage at all times.

It is pre-programmed and contains airﬂows for all modes of

operation.

The ICM2 reacts to changes in system static pressures to main-

tain constant airﬂow. The blower delivers requested airﬂow

up to about 0.7 in. of static pressure.

The ICM2 will not operate with high voltage alone; low volt-

age must be applied to the control plug for the motor to run.

The ICM2 is ﬁrst fed high voltage through the 5-pin connec-

tor. As this occurs, the AC power is rectiﬁed to DC by a diode

module.After rectiﬁcation, the DC signal is electronically com-

municated and fed in sequential order to stator windings. The

frequency of communication pulses determines motor speed.

The rotor is permanently magnetized.

The ICM2 interfaces with the Easy Select Board (Fig. 2 and

3). Setting up desired system airﬂow is accomplished through

selections made on the Easy Select Board. Power for the sys-

tem is supplied from a 230-vac, 60 Hz line. A class 2 voltage

(24 vac nominal) transformer is used for thermostat connec-

tions. The transformer is located either in, or below, the main

unit control box, depending on the unit. The secondary (SEC)

side of the transformer is connected to the control box. The

24-vac secondary circuit includes a socket, soldered into the

circuit at SEC2, to receive a 5-amp automotive-type fuse.

ICM2 SELECTION MODES

Connections to the thermostat are made at leads connect-

ed through P1 of the Easy Select Board. Eighteen 0.187-in.

quick-connect terminals comprise the ﬁeld select taps, which

provide programming selection for ICM2. Wiring for the 5

selection modes is listed in Table 2.

Table 2 — ICM2 Selection Mode Wiring

MODE WIRE COLOR

AUX Heat Range Violet

AC/HP Size Blue

Type Orange

AC/HP CFM Adjust Black

AC/HP Time Delay Gray

LEGEND

AC — Air Conditioning

HP — Heat Pump

The 557A, 589A, 657A and 658A units are factory-set to

operate properly with system components. See Fig. 4 for fac-

tory default settings. To reconﬁgure a basic system, refer to

information printed on the circuit board next to select pins,

and to base unit installation instructions. Move the 5 selec-

tion wires to match the components used.

troubleshooting guide

INTEGRATED CONTROL MOTOR (ICM2)

Cancels: New TI 557A-48-1

3/15/97

1 2 3 4 5 6 ... 15 16

Résumé du contenu

Page 1

CONTENTSPageGENERAL ... 1COMPONENT DESCRIPTION ... 1-5ICM2 Selection Modes ...

Page 2

Fig.6—Wiring Diagram, Units 658A048,060; 208/230-3-60LEGENDAWG — American Wire GageBR — Blower RelayC—Contactor, CompressorCAP — CapacitorCB — Circuit

Page 3 - JW — Jumper Wire

LEGENDRS — Rollout SwitchSEC — SecondaryTRAN — TransformerField SpliceTerminal (Marked)Terminal (Unmarked)SpliceSplice (Marked)Factory WiringField Con

Page 4 - 657A MODELS

Fig.8—Wiring Diagram, Units 589A048,060; 208/230-3-60LEGENDAWG — American Wire GageBR — Blower RelayC—ContactorCAP — CapacitorCOMP — Compressor MotorC

Page 5

LEGENDAWG — American Wire GageC—Contactor, CompressorCAP — CapacitorCOMP — Compressor MotorCTD — Compressor Time DelayDB — Defrost BoardDFT — Defrost

Page 6

Fig. 10 — Wiring Diagram, Units 657A048,060; 208/230-3-60LEGENDAWG — American Wire GageC—Contactor, CompressorCAP — CapacitorCOMP — Compressor MotorCT

Page 7

UNIT557ATERMINAL NO.123 4CFM(VIO) Aux, Heat Range 1300 1400 1600 1750(BLU) AC/HP Size 1400 1600 1750 2000(GRY) AC/HP Time Delay30 sec.ON1 min.OFF0 sec

Page 8 - TROUBLESHOOTING SUMMARY

UNIT557ATERMINAL NO.123 4CFM(VIO) Aux, Heat Range 1300 1400 1600 1750(BLU) AC/HP Size 1400 1600 1750 2000(GRY) AC/HP Time Delay30 sec.ON1 min.OFF0 sec

Page 9

A. AUX HEAT RANGEAirﬂow for 658A and 589A units is a preset factory selec-tion. The airﬂow selection must not be set lower than the de-fault. Refer to

Page 10

SEC 1SEC 2L O Y/Y2 W2 G Y112345678910LRCOY/Y2Y1GE/W1W2W3JW1JW2D2D1D3D4D5 AC/HPTIME DELAY AC/HPCFM ADJUSTGRY1234LOMEDHIBLKORNHPCHPTYPEACAC/H

Page 11

VIOBLUORNBLKGRY1300140014001600ACLO22130 sec ON/60 sec OFF0 sec ON/0 sec OFF2331600 17501750 200044HPC HPMED HI0 sec ON/30 sec OFF0 sec ON/45 sec OFF4

Page 12

E. AC/HP TIME DELAYFour motor operation delay proﬁles are provided to custom-ize and enhance system operation. These selections includean option for n

Page 13

II. FAN WILL TURN ON, BUT ELECTRIC HEAT STATES WILLNOTPerform the following checks:1. Check relay wirings, fuses to electric heaters (if appli-cable),

Page 14

IV. MOTOR DOES NOT RUNPerform the following checks:1. Check all plugs and receptacles on ICM2 circuit boardand motor for bad connections. Be sure all

Page 15

TROUBLESHOOTING SUMMARYUse Table 8 and Fig. 5-12 in troubleshooting.Table8—Troubleshooting SummarySYMPTOM CAUSE REMEDYMotor runs in some operationmode

Page 16

Fig.5—Wiring Diagram, Units 658A048,060; 208/230-1-60LEGENDAWG — American Wire GageBR — Blower RelayC—Contactor, CompressorCAP — CapacitorCB — Circuit

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BDP A 658A Guide de dépannage

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