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Carrier HS070-160 - page 1
HEATING & COOLING 30HR,HS070-160 Flotronic Plus Reciprocating Liquid Chillers Controls Troubleshooting Guide Alf Model E Units Have Microprocessor Controls and Electronic Expansion Valves CONTENTS SAFETY CONSIDERATIONS Page SAFETY CONSlDERATlONS ................ 1 FLOTRONIC PLUS CONTROL SYSTEM ..... l-4 Generat ................................. ...
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Carrier HS070-160 - page 2
- Features - The 30HR,HS control panel is shown in Fig. 1. PROCESSOR MODULE - This module contains the operating software and controls the operation of the machine. It continuously monitors information received from the various temperature thermistors and communi- cates with the relay module to increase or decrease the active stages of capacity. Th ...
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Carrier HS070-160 - page 3
Each function has one or more subfunctions as shown At initial start-up the valve position is initialized to 0. in Table 2. These functions are defined in greater detail After that, the microprocessor keeps accurate track of the in t K Controls Operation section of this book. Fig. 2 - Keyboard and Display Module ELECTROWIC EXPANSION VALVE ~ The mic ...
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Carrier HS070-160 - page 4
Table 3 - Thermistors CONTROL SEQUENCE The control power (115-l-60 for 60-Hz units; 230-l-50 for 50-Hz units) must be supplied directly from a separate source through a code-approved fused disconnect to the Ll and L2 terminals of unit power teminal block. NOTE: There is no switch or circuit breaker; only fuses. If the control power feed is live, so ...
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Carrier HS070-160 - page 5
When the second or lag refrigeration circuit is started, the circuit will go through a lo-second pumpout unless the circuit has been operating in the 15 minutes prior to this start. Upon load reduction, the control system will unload the unit in the reverse order of loading until the capacity nearly matches the load. Each time the lead compressor i ...
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Carrier HS070-160 - page 6
Table 5 - Accessing Functions and Subfunctions OPERATION To access a function, press the subfunction number and the function name key. The display will show the subfunction group To move to the other elements, scroll up or down using the arrow keys When the last element in a subfunction has been displayed, the first element wilt be repeated To move ...
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Carrier HS070-160 - page 7
Table 6 - Keyboard Directory STATUS QUICK TEST KEYBOARD ENTI DISPLAY KEYBOARD ENTRY DISPLAY COMMENT Factory/field test of inputs Leaving water temperature Entering water temperature Saturated suction temp circuit A Compressor suction gas temp circuit A Saturated suction temp circuit B Compressor suction gas temp circuit B Reset temperature Loss of ...
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Carrier HS070-160 - page 8
Table 6 - Keyboard Directory (cant) SERVICE CONFIGURATtONS KEYBOARD ENTRY COMMENT KEYBOARD ENTRY 1 DtSPLAY i COMMENT DISPLAY OVRD X SCHTYP X PERIOD 1 MON X TUE X WED X THU X FRI X SAT x SUN X Entering number of hours to extend Schedule Type ( ) = entry codes (. = inactive, 1 = single set point, 2 = dual set point) 3ut as follows. -0GGED ON -0G OF ...
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Carrier HS070-160 - page 9
Table 7 - Display Codes OPERATING MODES Display Description Comp Al Al Failure Camp A2 ii: Failure Comp Bl Failure Comp B2 Failure Loss of charge circuit A Loss of charge circuit B Low cooler flow Low oil pressure circuit A low oil pressure circuit B Freeze protection High suction superheat circuit A High suction superheat circuit B Low suction suo ...
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Carrier HS070-160 - page 10
p-JB (Modes) The operating mode codes are dis- played to indicate the operating status of the unit at a given time. (See Table 7). The modes are explained in the Troubleshooting sec- tion on page 12. (Position) The position subfunction displays the current position of the electronic expansion valves in steps: Fully Open (760) Operating Position ( 1 ...
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Carrier HS070-160 - page 11
Programming Functions SERVICE FUNCTION - The service function allows the operator to verify factory configurations and read or change field configurations. The service subfunctions are listed below. (See Table 6 for details.) The operator must use this subfunction to and log on before performing to log off after completing any other subfunction, se ...
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Carrier HS070-160 - page 12
TROUBLESHOOTING If necessary, review the Flotronic Plus Control System, Control Sequence, and Controls Operation sections found in this book. Tables 5 and 6 show how to use the keyboard/display module to access functions and sub- functions. (These procedures are also explained in the 3OHR,HS Installation, Start-Upand Service Instructions along with ...
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Carrier HS070-160 - page 13
NOTE: The control does not detect circuit breaker failures. If a circuit breaker trips on the lead compressor in a circuit, a low oil pressure failure will be indicated; on the other compressors, no failure will be indicated. Checkout P~-o~etiur~ (Codes 51-54) - Shut off the main power to the unit. Turn on control power, then step through the Quick ...
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Carrier HS070-160 - page 14
LEAVING WATER SUCTION ,----CONNECTION (T58T6) INLET COOLER TUBE CONNECTION THERMISTOR.. ENTERING COOLER WATER SENSOR (T21 Fig. 4 - Cooler Sensor Locations Bau’ The~~isfor ~ Thermistors mis-located or out of calibration. Code 68 and 69, Low Suction Superheat ~‘-- if the follow- ing logic is satisfied, then all the compressors on the circuit wi ...
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Carrier HS070-160 - page 15
KEYBOARD I DISPLAY ENTRY RESPONSE q u 3 TEST COMP y$. CAM OFF q ENTR CA1 ON I CAM OFF q + CA2 OFF END TEST COMMENTS Factory field test of compressors subfunction of test function Circuit A, compressor 1 test Pressing ENTR starts the test; when the compressor should be running the display shows CA1 on If the test is allowed to time out, the display ...
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Carrier HS070-160 - page 16
THE PROCESSOR OPERATES THESE CONTACTS Fig. 5 - Compressor 24-V Control Circuit Wiring (Simplified) 24V FEED 24V NEUTRAL 24v FEED 1 / DSlO TERM ?$I.- STRIP 24v NEUTRAL LC%%R&F CIRCUIT B LOSS OF CHARGE CiRCUtT A Fig. 6 - Pressure Feedback Circuit Wiring (Simplified) UNLOADER CKT. A UNLOADER CKT. B LIQUID LINE SOLENOID CKT. A LIQUID LINE SOLENOID ...
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Carrier HS070-160 - page 17
Table 8a - Thermistsr Temperature vs Resistance and Voltage (English) TEMPERATURE VI -25.0 -24.0 -23.0 -22.0 -21.0 -20.0 -19.0 -18.0 -17.0 -16.0 -15.0 -14.0 -13.0 -12.0 -11.0 -10.0 -9.0 -8.0 -7.0 -6.0 -5.0 -4.0 -3.0 -2.0 -1.0 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0 17.0 18.0 19.0 20.0 21.0 22.0 23.0 24.0 25.0 26.0 ...
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Carrier HS070-160 - page 18
Table 8b - Thermistor Temperature vs Resistance and Voltage (Sk) TEMPERATURE 62 -39 -38 -37 -36 -35 -34 -33 -32 -31 -30 -29 -28 -27 -26 -25 -24 -23 -22 -21 -20 -19 -la -17 -16 -15 -14 -63 -12 -17 -10 -9 -a -7 -6 -5 -4 -3 -2 -3 0 1 2 3 4 r ; 7 a 9 10 11 12 I3 14 15 VOLTAGE 4.8961 4.8892 4 4.88177 4.874 4.86577 4.85709 4.84793 4.83a39 4.82808 4.81736 ...
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Carrier HS070-160 - page 19
Electronic Expansion Valves CHECKOUT PRCKEDCRE ~ 1-<11low steps below to diagnose and correct EXV problems, For an explanarjon of EXV operation, see paye 2 1. Step 1 - Check EXV Driver Outputs ~ Chcuk l_XV output signals at appropriate terminals on the E.YV driver module (Fig. 8) as folIows: Connect positive test lcad to terminal 1 on EXV driver ...
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Carrier HS070-160 - page 20
-MUFFLERS MUFFLERS - COMPRESSORS COMPRESSORS Fig. 9 - Thermistor Locations Step 4 - Check Thermistors That Control EXV - Check thermistors that control processor output voltage pulses to EXVs. Circuit A thermistors are T5 and T7. Circuit B thermistors are T6 and T8. Refer to Fig. 9 for location. 1. lJse the temperature subfunction of the status fun ...
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Carrier HS070-160 - page 21
The EXV test can be repeated r-rs required by pressing may be due to out-of-calibration thcrmistorfs), or inter- mittent connections between processor board tcrn?inals and EXV plug. Recheck all wiring connections ;tnd voltage signals. Other possible causes of improper refrigerant flow control could be restrictions in liquid line. Check i‘or plugg ...
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Carrier HS070-160 - page 22
Thermistors - All thermistors are identical in their temperature vs resistance performance. Resistance at various temperatures are listed in Table 8. LOCATION -- General location of thermistor sensors are shown in Fig. 9. Cooler Leaving Water Sensor, TL, is located in the leav- ing water nozzle. The probe is immersed directly in the water. All ther ...
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Carrier HS070-160 - page 23
Modules Turn controller power off before servicing tha controls. This is to ensure safety and prevent damage to the controller. PROCESSOR MODULE (PSIO), LOW-VOLTAGE RELAY MODULE (DSIO) AKD EXV DRIVER MODULE (DSlO) - The PSI0 and DSIO modules all perform continuous diagnostic evaluations of the condi- tion of the hardware. Proper operation of these ...
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Carrier HS070-160 - page 24
On the sensor bus terminal strips, terminal 1 of the PSI0 module is connected to terminal 1 of each of the other modules; terminals 2 and 3 are connected in the same manner. (See Fig. 13.) If a terminal 2 wire is con- nected to terminal 1, the system will not work. in the 30HK,HS units, the processor module, low- voltage relay module, and keyboard! ...
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Carrier HS070-160 - page 25
EXV Driver Module (Fig. 16.) Inputs ~ Input on strip 32 am-c discrcre inputs (O?;-OFF). When 24 vat are applied across thy 2 terminals in a channel it is read as an ON signal. Zero voIts is read as an OFF signal. Outputs ~ Two stepper motor driver outputs ;tre used to drive the electronic expansion valves, Terminals I and 7 supply voltage to the va ...
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Carrier HS070-160 - page 26
TROUBLESHOOTING SYMPTOMS CAUSE I REMEDY SYMPTOMS Compressor does not run CAUSE REMEDY Unit operates long or continuously Power line open Reset circuit breaker. Control fuse open Safety thermostat tripped (DGT) Check control circuit for ground or short. Replace fuse. Move RUN/STANDBY switch to STANDBY, then back to RUN. Tripped power breaker Check t ...
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Carrier HS070-160 - page 27
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Carrier HS070-160 - page 28
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. --I- Book 2 PC111 Catalog No. 533-030 Printed in U.S.A. Form30HR,HS-1T Pg 28 l-89 Replaces: New Tab 5c ...
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