Instruction/ maintenance manual of the product H)A24K25L Friedrich
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TECHNICAL SUPPORT CONT ACT INFORMA TION INTR ODUCTION This service manual is designed to be used in conjunction with the installation manuals provided with each unit. This service manual was written to assist the professional HV AC service technician to quickly and accurately diagnose and repair any malfunctions of this product.
1 T able of Contents 2-4 4 5 5 6 7 8 9-10 11 12 12-13 14 15 16 16 17-18 19 20 21 21 22 22-23 23 23 Important Safety Information ........................................... Introduction ..................................................................
IMPORT ANT SAFETY INFORMA TION The information contained in this manual is intended for use by a qualied service technician who is familiar with the safety procedures required for installation and repair , and who is equipped with the proper tools and test instruments required to service this product.
Do not spray or pour water on the return air grille, discharge air grille, evaporator coil, control panel, • and sleeve on the room side of the air conditioning unit while cleaning.
4 PROPERTY DAMAGE HAZARDS FIRE DAMAGE HAZARDS: Read the Installation/Operation Manual for this air conditioning unit prior to operating. • Use air conditioner on a single dedicated circuit within the specied amperage rating. • Connect to a properly grounded outlet only .
ELE CTRIC H EA TER SIZE A- Series 0 0 = N o ele ctr ic heat 25 = 2. 5 K W 3 4 = 3.4 K W 5 0 = 5.0 K W 7 5 = 7 .5 K W 1 0 = 1 0 K W NO MI NA L C AP A CI TY A- Serie s (Btu / h) 09 = 9, 00 0 1 2 = 1 2, .
6 Chassis Specications Model 2010 VEA09K VEA12K VEA18K VEA24K VHA09K VHA12K VHA18K VHA24K COOLING DATA COOLING BTUh 9400/9000 11500/11200 17000/16500 23000/22700 9200/9000 11500/11200 17000/16800 23000/22800 POWER (W) 959 1173 1888 2421 939 1186 1868 2527 1 .
7 Extended Cooling Performance V EA - EXTENDED COOLING PERFORMANC E 72 67 62 72 67 62 72 67 62 72 67 62 72 67 62 BTUh 11054 10631 9842 10528 9926 9156 10114 9400 8319 9475 8413 7417 8954 7835 6914 WATTS 783 795 804 853 861 872 959 959 959 1037 1036 1039 1084 1083 1087 AMPS 3.
8 ELECTRICAL REQUIREMENTS W ir e Siz e Uni t MUS T Sample Nameplat e 1 20 5 2 4 COO LIN G EQU IPME NT FOL LO WING ITEMS OU TD OOR GR IL LE INDOO R GRI LLE S A M P L E Elec tr ica l Ra t in g T a ble s 4 1 A 5 1 2 1 A 0 2 0 1 A 0 3 All units must be hard wired with properly sized br eaker .
9 RE MOTE THERM OST A T AND LOW V OL T A GE CONTR OL CONNECTIONS Remote Thermostat To control the unit with a wall-mounted thermostat: 1) Pull the disconnect switch.
10 RE MOTE THERM OST A T AND LOW V OL T A GE CONTR OL CONNECTIONS ( Continued) Desk Control Terminals The Friedrich VERT-I-PAK has built-in provisions for connection to an external switch to control power to the unit. The switch can be a central desk control system or even a normally open door switch.
11 ELECTR ONIC CONTROL BO ARD FEA TURES The new Friedrich V ert-I-Pak has state of the art features to improve guest comfort and conserve energy . Through the use of specically designed control software, Friedrich has accomplished what other Manufacturer ’s have only attempted – a quiet, dependable, affordable and easy to use V ert-I-Pak.
12 Lo w fa n Hig h f an Fa n onl y Pow er T emp T emp Co ol Hea t 1 2 3 4 5 6 7 8 O N Electronic C on tro l Co n fi gu ra ti on The ad justa bl e c on trol dip swit ches are loc at ed at the lowe r left ha nd por tion of the di gi tal Smart Cent er .
13 Electr onic Control Er ror Code Dia gnostics Error Code e s u a C e l b i s s o P t i n U y B n e k a T n o i t c A n o i t a l s n a r T e d o C y l l a m r o N g n i t a r e p O t i n U e n o N e e r F r o r r E F E 02 Extreme low voltage condition exists (<198V for 230V units and <239V for 265V units).
14 VP A K ELECTRONIC CONT ROL F E A TURES Thermostat Compatibility: The VP AK Electronic Control is compatible with Friedrich RT4 and RT5 Thermostats. The VP AK Electronic control is also compatible with most standard Single Stage Heat/Cool Thermostats.
EX AMPLE: Air fl ow re quireme nts are c al c ul ated as follows : (H aving a we t coil creates additional resistanc e to air fl ow . Th is addit io nal re sis t an ce must be take n in to co ns iderat ion to obtain accurate air fl ow information.
The V ert-I-Pak A series units must be installed with a free return air configuration. The table below lists the indoor airflow at corresponding static pressures. All units are rarted at low speed. The V ert-I-Pak units are designed for either single speed or two fan speed operation.
BLOWER / F AN MOTOR TEST BLOWER / F AN MOTOR A single phase pe rm ane n t split c apa ci tor mo tor is us ed to dr i v e the e v apor a t or bl ow er and co nde n ser fa n . A self - r es e t ting ov erl oa d is lo cat ed in si de t he mot or to pr ot e ct against hi gh t emper a t ure and high amperage co nd itions.
DRAIN P AN V AL VE During the cooling mode of operation, condensate which collects in the drain pan is picked up by the condenser fan blade and sprayed onto the condenser coil.
A good understanding of the basic operation of the refrigeration system is essential for the service technician. Without this understanding, accurate troubleshooting of refrigeration system problems will be more difcult and time consuming, if not (in some cases) entirely impossible.
SER VICE CUT/SEVER HAZARD CAUTION Be careful with the sharp edges and corners. Wear protective clothing and gloves, etc. Failure to do so could result in minor to moderate injury . ELECTRIC SHOCK HAZARD W ARNING T urn off electric power before service or installation.
R efrigerant Char ging Proper refrigerant charge is essential to proper unit opera - tion. Operating a unit with an improper refrigerant charge will result in reduced performance (capacity) and/or efciency .
3. Install a process tube to sealed system. 4. Make necessary repairs to system. 5. Evacuate system to 200 microns or less. 6. Weigh in refrigerant with the property quantity of R-410A refrigerant. 7. Start unit, and verify performance. 8. Crimp the process tube and solder the end shut.
Ov erchar ged R efrigerant Systems After the unit has run 10 to 15 minutes, check the gauge pressures. Gauges connected to system with an undercharge will have low head pressures and substantially low suction pressures. Improper air ow over the evaporator coil may indicate some of the same symptoms as an over charged system.
METERING DEVICE Capillar y T ube Systems All units are equipped with capillary tube metering devices. Checking for restricted capillary tubes. 1. Connect pressure gauges to unit. 2. Start the unit in the cooling mode. If after a few minutes of operation the pressures are normal, the check valve and the cooling capillary are not restricted.
25 NOTE: System operating pressures must be near normal before valve can shift . REVERSING V AL VE DESCRIPTION/OPERA TION The Reversing V alve controls the direction of refrigerant ow to the indoor and outdoor coils. It consists of a pressure- operated, main valve and a pilot valve actuated by a solenoid plunger .
26 Reversing V alve in Heating Mode When sluggish or stuck in the mid-position, part of the discharge gas from the compressor is directed back to the suction side, resulting in excessively high suction pressure.
27 8. Pressurize sealed system with a combination of R-22 and nitrogen and check for leaks, using a suitable leak detector . Recover refrigerant per EP A guidelines.
28 Remove the leads from the compressor terminals and set the ohmmeter on the lowest scale (R x 1). T ouch the leads of the ohmmeter from terminals common to start (“C” to “S”). Next, touch the leads of the ohmmeter from terminals common to run (“C” to “R”).
29 R ecommended pr ocedure for compr essor replacement 1. Be certain to perform all necessary electrical and refrigeration tests to be sure the compressor is actually defective before replacing. 2. Recover all refrigerant from the system though the process tubes.
30 1. 2. 3. 4. 5. ELECTRIC SHOCK HAZARD W ARNING T urn off electric power before service or installation. Failure to do so may result in personal injury , or death. S e al ed R e f r ig e r a t io n Sy st e m c o nt a i n s r e fr i g e r an t and oil under high pressure.
ELECTRICAL TR OUBLESHOO TING CHART - COOLING 9K BTU , 12K BTU , & 18K BTU NO COOLING OPERATION Insure that Fuses are good and/or that Circuit Breakers are on and voltage is 208/230 Compressor and .
ELECTRICAL TR OUBLESHOO TING CHART - COOLING 24K BTU Y es No 24V at t-stat and control wiring? Y es No 24V at t-stat and control wiring? NO COOLING OPERATION Before continuing check for Error Codes, s.
ELECTRICAL TR OUBLESHOO TING CHART HEA T PUMP Replace Reversing V alve NO NO YES YES Reversing V alve Stuck YES Replace Solenoid Coil Is the Solenoid Coil Good? Is Line V oltage Present at Solenoid V alve? Is Selector Switch set for Heat? SYSTEM COOLS WHEN HEA TING IS DESIRED.
REFRIGERANT SYSTEM DIAGNOSIS COOLING REFRIGERANT SYSTEM DIAGNOSIS HEA TING Low Load Conditions High Load Conditions Low Load Conditions High Load Conditions Low Air Flo w Across High Air Flow Across R.
COOL WITH ELECTRIC HEA T ELECTRICAL & THERMOST A T WIRING DIA GRAM VEA 09/12/18 with 2.5 KW , 3.4 KW or 5KW ELECTRIC HEA T NOTE: THE DIAGRAM ABOVE, ILLUSTRA TES THE TYPICAL THERMOS TA T WIRING FOR TWO SPEED F AN OPERA TION. SEE THE UNIT CONTROL P ANEL FOR THE ACTUAL UNIT WIRING DIAGRAM AND SCHEMA TIC.
HEA T PUMP WITH ELECTRIC HEA T ELECTRICAL & THERMOST A T WIRING DIA GRAM VHA 09/12/18 with 2.5 KW , 3.4 KW or 5KW ELECTRIC HEA T NOTE: THE DIAGRAM ABOVE, ILLUSTRA TES THE TYPICAL THERMOS TA T WIRING FOR TWO SPEED F AN OPERA TION. SEE THE UNIT CONTROL P ANEL FOR THE ACTUAL UNIT WIRING DIAGRAM AND SCHEMA TIC.
COOL WITH ELECTRIC HEA T ELECTRICAL & THERMOST A T WIRING DIA GRAM VEA 24 with 2.5 KW , 3.4 KW or 5KW ELECTRIC HEA T 37.
HEA T PUMP WITH ELECTRIC HEA T ELECTRICAL & THERMOST A T WIRING DIA GRAM VHA 24 with 2.5 KW , 3.4 KW or 5KW ELECTRIC HEA T 38.
COOL WITH ELECTRIC HEA T ELECTRICAL & THERMOST A T WIRING DIA GRAM VEA 24 with 7.5 KW and 10 KW ELECTRIC HEA T 39.
HEA T PUMP WITH ELECTRIC HEA T ELECTRICAL & THERMOST A T WIRING DIA GRAM VHA 24 with 7.5 KW and 10KW ELECTRIC HEA T 40.
TECHNICAL SERVICE DATA VEA09K**RTL 230/208 4.2 58 22 118 156 66 9 24 151 389 33.5 VEA12K**RTL 230/208 5.2 57 23 116 158 59 12 17 141 396 32.0 VEA18K**RTL 230/208 8.1 55 25 127 180 60 12 28 135 455 48.0 VEA24K**RTL 230/208 10.0 55 25 125 170 61 10 34 135 440 65.
TECHNICAL SUPPORT CONT ACT INFORMA TION FRIEDRICH AIR CONDITIONING CO . Post Ofce Box 1540 · San Antonio, T exas 78295-1540 4200 N. Pan Am Expressway · San Antonio, T exas 78218-5212 (210) 357-4400 · 1-800-541-6645 · F AX (210) 357-4490 www .friedrich.
FRIEDRICH AIR CONDITIONING CO . Post Ofce Box 1540 · San Antonio, T exas 78295-1540 4200 N. Pan Am Expressway · San Antonio, T exas 78218-5212 (210) 357-4400 · F AX (210) 357-4490 www .
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However, one of the most important roles played by the user manual is to help in solving problems with Friedrich H)A24K25L. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Friedrich H)A24K25L along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
