Service Manual – R410A Models
A Series (Electronic Controls)
Single Package Vertical Air Conditioning System
L Sufx Models
V(E, H)A09K25L-* V(E, H)A09K34L-* V(E, H)A09K50L-*
V(E, H)A12K25L-* V(E, H)A12K34L-* V(E, H)A12K50L-*
V(E, H)A18K25L-* V(E, H)A18K34L-* V(E, H)A18K25L-*
V(E, H)A24K25L-* V(E, H)A24K34L-* V(E, H)A24K50L-*
V(E, H)A24K75L-* V(E, H)A24K10L-*
VP K- Se rv Ma n- L (1-10) *Last D igit May Vary
INTRODUCTION
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 HVAC service technician to quickly and accurately
diagnose and repair any malfunctions of this product.
This manual, therefore, will deal with all subjects in a general nature. (i.e. All text will pertain to all models).
IMPORTANT:
FRIEDRICH AIR CONDITIONING CO.
Post Ofce Box 1540 · San Antonio, Texas 78295-1540
4200 N. Pan Am Expressway · San Antonio, Texas 78218-5212
(210) 357-4400 · 1-800-541-6645 · FAX (210) 357-4490
www.friedrich.com
It will be necessary for you to accurately identify the unit you are
servicing, so you can be certain of a proper diagnosis and repair.
(See Unit Identication.)
TECHNICAL SUPPORT
CONTACT INFORMATION
Printed in the U.S.A.
Table of Contents
Important Safety Information ...........................................
Introduction .........................................................................
Vert-I-Pak Model Number Identication Guide ...................
Serial Number Identication Guide ....................................
Chassis Specications .......................................................
Extended Cooling Performance .........................................
Electrical Requirements .....................................................
Remote Thermostat and Low Voltage Control ..............
V-PAK Electronic Control Board Features ........................
Electronic Control Conguration .......................................
Electronic Control Error Code
Diagnostics/Test Mode .................................................
Electronic Control Features ..............................................
Checking External Static Pressure ...................................
Checking Approximate Airow ..........................................
Airow Charts ....................................................................
9-10
12-13
2-4
4
5
5
6
7
8
11
12
14
15
16
16
Capillary Tube Systems/Check Valve ..........................
Reversing Valve — Description/Operation ..................
Testing Coil ..................................................................
Checking Reversing Valves ....................................
Reversing Valve
Touch Testing Heating/Cooling Cycle .........................
Procedure For Changing Reversing Valve .............
Compressor Checks ....................................................
Locked Rotor Voltage Test ..........................................
Single Phase Connections .........................................
Determine Locked Rotor Voltage ...............................
Locked Rotor Amperage Test ......................................
Single Phase Running & Locked Rotor Amperage .....
Checking the Overload ...........................................
External Overload ........................................................
Compressor Single Phase Resistance Test ................
24
25
25
25-26
26
26-27
27
27
27
27
27
27
27-28
28
28
Components Testing ....................................................
Refrigeration Sequence of Operation ...............................
Service .............................................................................
Sealed Refrigeration System Repairs ..............................
Refrigerant Charging ........................................................
Method Of Charging .........................................................
Undercharged Refrigerant Systems ............................
Overcharged Refrigerant Systems ...................................
Restricted Refrigerant Systems .......................................
17-18
22-23
19
20
21
21
22
23
23
Compressor Replacement .....................................
Routine Maintenance ...................................................
9-18 Electrical Troubleshooting Chart – Cooling .........
2-Ton Electrical Troubleshooting Chart – Cooling .......
Electrical Troubleshooting Chart – Heat Pump ...........
Refrigerant System Diagnosis – Cooling ....................
Refrigerant System Diagnosis – Heating ....................
Electrical and Thermostat Wiring Diagrams ...........
Technical Service Data ................................................
29-30
35-40
30
31
32
33
34
34
41
1
IMPORTANT SAFETY INFORMATION
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.
Installation or repairs made by unqualied persons can result in subjecting the unqualied person making
such repairs as well as the persons being served by the equipment to hazards resulting in injury or electrical
shock which can be serious or even fatal.
Safety warnings have been placed throughout this manual to alert you to potential hazards that may be
encountered. If you install or perform service on equipment, it is your responsibility to read and obey these
warnings to guard against any bodily injury or property damage which may result to you or others.
We have provided many important safety messages in this manual and on your appliance. Always read
and obey all safety messages.
WARNING
CAUTION
All safety messages will tell you what the potential hazard is, tell you how to reduce the chance of injury,
and tell you what will happen if the instructions are not followed.
NOTICE
Your safety and the safety of others are very important.
This is a safety Alert symbol.
This symbol alerts you to potential hazards that can kill or hurt you and others.
All safety messages will follow the safety alert symbol with the word “WARNING”
or “CAUTION”. These words mean:
You can be killed or seriously injured if you do not follow instructions.
You can receive minor or moderate injury if you do not follow instructions.
A message to alert you of potential property damage will have the
word “NOTICE”. Potential property damage can occur if instructions
are not followed.
PERSONAL INJURY OR DEATH HAZARDS
ELECTRICAL HAZARDS:
Unplug and/or disconnect all electrical power to the unit before performing inspections, •
maintenance, or service.
Make sure to follow proper lockout/tag out procedures.•
Always work in the company of a qualied assistant if possible. •
Capacitors, even when disconnected from the electrical power source, retain an electrical charge •
potential capable of causing electric shock or electrocution.
Handle, discharge, and test capacitors according to safe, established, standards, and approved •
procedures.
Extreme care, proper judgment, and safety procedures must be exercised if it becomes necessary •
to test or troubleshoot equipment with the power on to the unit.
2
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.
Electrical component malfunction caused by water could result in electric shock or other electrically •
unsafe conditions when the power is restored and the unit is turned on, even after the exterior is dry.
Never operate the A/C unit with wet hands.•
Use air conditioner on a single dedicated circuit within the specied amperage rating. •
Use on a properly grounded outlet only.•
Do not remove ground prong of plug.•
Do not cut or modify the power supply cord.•
Do not use extension cords with the unit.•
Follow all safety precautions and use proper and adequate protective safety aids such as: gloves, •
goggles, clothing, adequately insulated tools, and testing equipment etc.
Failure to follow proper safety procedures and/or these warnings can result in serious injury or death. •
REFRIGERATION SYSTEM HAZARDS:
Use approved standard refrigerant recovering procedures and equipment to relieve pressure before •
opening system for repair.
Do not allow liquid refrigerant to contact skin. Direct contact with liquid refrigerant can result in minor •
to moderate injury.
Be extremely careful when using an oxy-acetylene torch. Direct contact with the torch’s ame or hot •
surfaces can cause serious burns.
Make sure to protect personal and surrounding property with re proof materials.•
Have a re extinguisher at hand while using a torch.•
Provide adequate ventilation to vent off toxic fumes, and work with a qualied assistant whenever •
possible.
Always use a pressure regulator when using dry nitrogen to test the sealed refrigeration system for •
leaks, ushing etc.
Make sure to follow all safety precautions and to use proper protective safety aids such as: gloves, •
safety glasses, clothing etc.
Failure to follow proper safety procedures and/or these warnings can result in serious injury or death. •
MECHANICAL HAZARDS:
Extreme care, proper judgment and all safety procedures must be followed when testing, •
troubleshooting, handling, or working around unit with moving and/or rotating parts.
Be careful when, handling and working around exposed edges and corners of sleeve, chassis, and •
other unit components especially the sharp ns of the indoor and outdoor coils.
Use proper and adequate protective aids such as: gloves, clothing, safety glasses etc.•
Failure to follow proper safety procedures and/or these warnings can result in serious injury or death.•
3
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.•
Do not remove ground prong of plug.•
Do not cut or modify the power supply cord.•
Do not use extension cords with the unit.•
Failure to follow these instructions can result in re and minor to serious property damage.•
WATER DAMAGE HAZARDS:
Improper installation maintenance, or servicing of the air conditioner unit, or not following the above •
Safety Warnings can result in water damage to personal items or property.
Insure that the unit has a sufcient pitch to the outside to allow water to drain from the unit. •
Do not drill holes in the bottom of the drain pan or the underside of the unit. •
Failure to follow these instructions can result in result in damage to the unit and/or minor to serious •
property damage.
4
ELECTRIC HEATER SIZE
A-Series
00 = No electric heat
25 = 2.5 KW
34 = 3.4 KW
50 = 5.0 KW
75 = 7.5 KW
10 = 10 KW
NOMINAL CAPACITY
A-Series (Btu/h)
09 = 9,000
12 = 12,000
18 = 18,000
24 = 24,000
EN GI NEER ING CODE
OPTIONS
RT = Stan dard Re mote Op er a tion
SP = Sea coast Pro tect ed
VOLTAGE
K = 208/230V-1Ph-60Hz
DESIGN SERIES
A = 32" and 47" Cabinet
E=Cooling with or without electric heat
H=Heat Pump
SERIES
V=Vertical Series
MODEL NUMBER V E A 24 K 50 RT L
Model Identifi cation Guide
A K A N 00001
LJ = 2009 AE = 2015
AK = 2010 AF = 2016
AA = 2011 AG = 2017
AB = 2012 AH = 2018
AC = 2013 AJ = 2019
AD = 2014
A = Jan D = Apr G = Jul K = Oct
B = Feb E = May H = Aug L = Nov
C = Mar F = Jun J = Sep M = Dec
PRODUCT LINE
N = VPAK
MONTH MANUFACTURED
VPAK Serial Number Identification Guide
SERIAL NUMBER
YEAR MANUFACTURED PRODUCTION RUN NUMBER
5
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
1.9/1.91.9/1.97.9/7.98.9/8.95.9/5.90.9/0.98.9/8.98.9/8.9REE
SENSIBLE HEAT RATIO 0.74 0.72 0.70 0.70 0.74 0.72 0.70 0.70
HEAT PUMP DATA
HEATING BTUh 8500 10800 16000 20000
COP @ 47F 3.0 3.0 3.0 3.0
HEATING POWER (W) 830 1055 1563 1953
4.95.79.46.3)A( TNERRUC GNITAEH
ELECTRICAL DATA
VOLTAGE
(1 PHASE, 60 Hz)
230/208 230/208 230/208 230/208 230/208 230/208 230/208 230/208
VOLT RANGE 253-198 253-198 253-198 253-198 253-198 253-198 253-198 253-198
COOLING CURRENT (A) 4.2/4.4 5.2/5.4 8.1/8.5 10.0/10.4 4.1/4.3 5.3/5.5 8.2/8.5 10.6/10.8
AMPS L.R. 19.8 30 42 34.8 18.5 26 42 34.8
5.98.755.35.98.75.45.3.L.F SPMA
INDOOR MOTOR (HP) 1/4 1/4 1/4 1/4 1/4 1/4 1/4 1/4
INDOOR MOTOR (A) 1.2 1.2 1.2 1.94 1.2 1.2 1.2 1.94
4/14/1)PH( ROTOM ROODTUO
58.058.0)A( ROTOM ROODTUO
AIRFLOW DATA
INDOOR CFM* 300 350 450 610 300 420 450 610
0606060606060606
MFC TNEV
"4."3."3."3."4."3."3."3.PSE .XAM
PHYSICAL
DIMENSIONS (W x D x H) 23x23x32 23x23x32 23x23x32 23x23x47 23x23x32 23x23x32 23x23x32 23x23x47
NET WEIGHT (LBS) 114 124 144 167 114 125 144 167
SHIPPING WEIGHT (LBS) 125 135 155 220 125 135 155 220
R410A CHARGE (oz) 33.5 35.5 48 65 39 42 52 74
* Normal Value Wet Coil @ .1"ESP.
A/NA/N
A/NA/N
N/A
N/A
N/A
N/A
ELECTRIC HEAT DATA
HEATER WATTS 2500/2050 3400/2780 5000/4090 2500/2050 3400/2780 5000/4090
VOLTAGE
HEATING BTUh
8500/7000 11600/9500 17000/13900 8500/7000 11600/9500 17000/13900
HEATING CURRENT (AMPS)
10.9/9.9 14.8/13.4 21.7/19.7 10.9/9.9 14.8/13.4 21.7/19.7
MINIMUM CIRCUIT AMPACITY 15 19.9 28.6 15 19.9 28.6
BRANCH CIRCUIT FUSE (AMPS)
15 20 30 15 20 30
BASIC HEATER SIZE 2.5 Kw 3.4 Kw 5.0 Kw 2.5 Kw 3.4 Kw 5.0 Kw
ELECTRIC HEAT DATA
HEATER WATTS
2500/2050 3400/2780 5000/4090 2500/2050 3400/2780 5000/4090 7500/6135 10000/8180
VOLTAGE
HEATING BTUh
8500/7000 11600/9500 17000/13900 8500/7000 11600/9500 17000/13900 25598/20939 34130/27918
HEATING CURRENT (AMPS)
10.9/9.9 14.8/13.4 21.7/19.7 10.9/9.9 14.8/13.4 21.7/19.7 32.6/29.5 43.5/39.3
MINIMUM CIRCUIT AMPACITY
15 19.9 28.6 17.2/15.9 22.1/20.3 30.7/28.1 44.3/40.3 57.9/52.7
BRANCH CIRCUIT FUSE (AMPS)
15 20 30 25 25 30 45 60
BASIC HEATER SIZE
2.5 Kw 3.4 Kw 5.0 Kw 2.5 Kw 3.4 Kw 5.0 Kw 7.5 Kw 10.0 Kw
42AHV/EV81AHV/EV
802/032802/032
21AHV/EV90AHV/EV
802/032802/032
6
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 3.5 3.5 3.5 3.7 3.8 3.8 4.2 4.20 4.2 4.5 4.5 4.5 4.7 4.7 4.7
SHR 0.51 0.69 0.93 0.52 0.71 0.95 0.52 0.74 0.95 0.53 0.78 0.96 0.55 0.81 0.95
BTUh 13524 13007 12041 12880 12144 11201 12374 11500 10178 11592 10293 9074 10954 9585 8458
WATTS 957 972 983 1043 1053 1066 1173 1173 1173 1268 1267 1270 1325 1325 1330
AMPS 4.3 4.3 4.4 4.6 4.7 4.7 5.2 5.20 5.2 5.6 5.6 5.6 5.9 5.9 5.9
SHR 0.49 0.67 0.90 0.50 0.70 0.92 0.51 0.72 0.92 0.52 0.76 0.93 0.53 0.79 0.93
BTUh 19992 19227 17799 19040 17952 16558 18292 17000 15045 17136 15215 13413 16193 14170 12504
WATTS 1541 1565 1582 1678 1695 1716 1888 1888 1888 2041 2039 2045 2133 2132 2140
AMPS 6.7 6.7 6.8 7.2 7.2 7.3 8.1 8.10 8.1 8.7 8.7 8.7 9.1 9.1 9.1
SHR 0.48 0.65 0.88 0.49 0.68 0.89 0.49 0.70 0.90 0.50 0.74 0.90 0.52 0.76 0.9
BTUh 27048 26013 24081 25760 24288 22402 24748 23000 20355 23184 20585 18147 21908 19171 16917
WATTS 1976 2007 2029 2152 2174 2201 2421 2421 2421 2617 2615 2622 2736 2735 2744
AMPS 8.3 8.3 8.4 8.9 9.0 9.0 10.0 10.00 10.1 10.8 10.8 10.8 11.3 11.3 11.3
SHR 0.48 0.65 0.88 0.49 0.68 0.89 0.49 0.70 0.9 0.5 0.74 0.9 0.52 0.76 0.9
V
HA - EXTENDED COOLING PERFORMANC
E
72 67 62 72 67 62 72 67 62 72 67 62 72 67 62
BTUh 10819 10405 9632 10304 9715 8961 9899 9200 8142 9274 8234 7259 8763 7668 6767
WATTS 766 778 787 835 843 854 939 939 939 1015 1014 1017 1061 1061 1064
AMPS 3.4 3.4 3.5 3.7 3.7 3.7 4.1 4.10 4.1 4.4 4.4 4.4 4.6 4.6 4.6
SHR 0.51 0.69 0.93 0.52 0.71 0.95 0.52 0.74 0.95 0.53 0.78 0.96 0.55 0.81 0.95
BTUh 13524 13007 12041 12880 12144 11201 12374 11500 10178 11592 10293 9074 10954 9585 8458
WATTS 968 983 994 1054 1065 1078 1186 1186 1186 1282 1281 1284 1340 1340 1344
AMPS 4.4 4.4 4.5 4.7 4.7 4.8 5.3 5.30 5.3 5.7 5.7 5.7 6 6 6
SHR 0.49 0.67 0.9 0.5 0.7 0.92 0.51 0.72 0.92 0.52 0.76 0.93 0.53 0.79 0.93
BTUh 19992 19227 17799 19040 17952 16558 18292 17000 15045 17136 15215 13413 16193 14170 12504
WATTS 1524 1549 1565 1661 1677 1698 1868 1868 1868 2019 2017 2023 2111 2110 2117
AMPS 6.8 6.8 6.9 7.3 7.3 7.4 8.2 8.20 8.2 8.8 8.8 8.9 9.2 9.2 9.3
SHR 0.48 0.65 0.88 0.49 0.68 0.89 0.49 0.70 0.90 0.50 0.74 0.90 0.52 0.76 0.9
BTUh 27048 26013 24081 25760 24288 22402 24748 23000 20355 23184 20585 18147 21908 19171 16917
WATTS 2062 2095 2118 2247 2269 2297 2527 2527 2527 2732 2729 2737 2856 2854 2864
AMPS 8.8 8.8 8.9 9.4 9.5 9.5 10.5 10.60 10.7 11.4 11.4 11.4 11.9 11.9 12
SHR 0.48 0.65 0.88 0.49 0.68 0.89 0.49 0.70 0.90 0.50 0.74 0.90 0.52 0.76 0.9
INDOOR WET BULB TEMP. (DEGREES F AT 80 F D.B.)
OUTDOOR DRY BULB TEMP. (DEGREES F AT 40% R.H.
)
VHA09
VHA12
75 85 95 105 110
VHA18
VHA24
RATING POINT
ARI 310/380
OUTDOOR DRY BULB TEMP. (DEGREES F AT 40% R.H.
)
75 85 95 105 110
VEA24
RATING POINT
ARI 310/380
INDOOR WET BULB TEMP. (DEGREES F AT 80 F D.B.)
VEA09
VEA12
VEA18
7
ELECTRICAL REQUIREMENTS
Wire Size
Unit MUST
Sample Nameplate
120524
COOLING EQUIPMENT
FOLLOWING ITEMS
OUTDOOR GRILLE
INDOOR GRILLE
SAMPLE
Electrical Rating Tables
41A51
21A02
01A03
All units must be hard wired with properly sized breaker. See nameplate for specific chassis electrical requirements.
Supply voltage
See Electrical Rating Table below for wire size. Use HACR type breakers to avoid nuisance trips. All field wiring must be done
in accordance with NEC and local codes.
ELECTRIC SHOCK HAZARD
WARNING
Turn off electric power before service or installation. All electrical connnections and wiring
MUST be installed by a qualified electrician and
conform to the National Electrical Code and all
local codes which have jurisdiction. Failure to
do so can result in personal injury and/or death.
Supply voltage to the unit should be a nominal 208/230 volts. It must be between 197 volts and 253 volts. Supply voltage to
the unit should be checked WITH THE UNIT IN OPERATION. Voltage readings outside the specified range can be expected
to cause operating problems. Their cause MUST be investigated and corrected.
“Use ONLY time delayed fused disconnect or HACR type circuit breaker as indicated on the unit’s rating plate (see
sample on this page). Proper current protection to the unit is the responsibility of the owner”.
8
REMOTE THERMOSTAT AND LOW VOLTAGE CONTROL
Remote Thermostat
To control the unit with a wall-mounted thermostat:
1) Pull the disconnect switch.
2) Unscrew and remove the control box panel.
3) After selecting which side you want to run your thermostat
wire through, run the wires through the side hole in the box
to reach the connection terminal for the wiring.
4) Make the wire connections, appropriately matching the
wires as shown in the wiring diagram.
5) Once each wire is matched and connected, the unit is now
controlled by the thermostat.
6) Reattach the control box cover.
RT5 (Two speed fan) RT4 (One speed fan)
Cool Off Heat
Auto On
All Friedrich Vert-I-Pak units are factory configured to be
controlled by using a 24V single stage remote wall mounted
thermostat. The thermostat may be auto or manual changeover
as long as the control configuration matches that of the
Vert-I-Pak unit.
NOTE: An improperly operating, or poorly located room
thermostat can be the source of perceived equipment
problems. A careful check of the thermostat and wiring
must be made then to insure that it is not the source of
problems.
Manual Changeover Thermostat
For Heat Pump equipped units: a single stage, heat/cool
thermostat with a terminal for a reversing valve operation is
required. Terminal “B” should be continuously energized in the
heat mode and terminal “G” should be energized whenever
there is a call for heating or cooling. (Typically, a single stage,
heat/cool thermostat designed for use with electric heat
systems will meet the above requirements).
Location
The thermostat should not be mounted where it may be
affected by drafts, discharge air from registers (hot or cold),
or heat radiated from the sun or appliances.
The thermostat should be located about 5 Ft. above the
fl oor in an area of average temperature, with good air
circulation. Close proximity to the return air grille is the
best choice.
Mercury bulb type thermostats MUST be level to control
temperature accurately to the desired set-point. Electronic
digital type thermostats SHOULD be level for aesthetics.
Thermostat Location
NOTICE
DO NOT use a two (2) stage Heat Pump Thermostat.
Use of this type of thermostat may result in equipment
and/or property damage
CONNECTIONS
9
REMOTE THERMOSTAT AND LOW VOLTAGE CONTROL
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.
For desk control operation, connect one side of the switch to
the D1 terminal and the other to the D2 terminal. Whenever
the switch closes, the unit operation will stop.
Maximum Wire Length for Desk Control Switch
Wire Size Maximum Length
#24 400 ft.
#22 600 ft.
#20 900 ft.
#18 1500 ft.
#16 2000 ft.
Auxiliary Fan Control
The Smart Center also has the ability to control a 24VAC
relay to activate an auxiliary, or transfer, fan. The outputs
are listed as F1 and F2 on the control board.
To connect the relay, simply wire one side of the relay to
F1 and the other side to F2. Anytime that the fan runs, the
terminals will send a 24VAC signal to the relay. The relay
must be 24 VAC, 50mA or less.
Note: The relay and auxiliary fans must be field supplied.
Note: The desk
control system and
switches must be
field supplied.
Thermostat Connections
C = Common Ground
W = Call for Heating
Y = Call for Cooling
R = 24V Power from Unit
GL = Call for Fan (Low Speed)
GH = Call for Fan (High Speed)
B = Reversing Valve Energized in heating mode
*If only one G terminal is present on thermostat, connect
to GL for low fan or to GH for high fan operation.
NOTE: It is the installer’s responsibility to ensure that all
control wiring connections are made in accordance with
the Freidrich installation instructions. Questions concerning proper connections to the unit should be directed to
the factory: 210-357-4400.
CONNECTIONS (Continued)
10
ELECTRONIC CONTROL BOARD FEATURES
The new Friedrich Vert-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 Vert-I-Pak.
Below is a list of standard features on every Friedrich VPAK and their benet to the owner.
Quiet Start/Stop
Fan Delay
Remote Thermostat
Operation
Internal Diagnostic
Program
Service Error Code
Storage
Room Freeze
Protection
Random
Compressor Restart
Digital Defrost
Thermostat
The fan start and stop delays prevent abrupt changes in room acoustics due to the compressor energizing
or stopping immediately. Upon call for cooling or heating the unit fan will run for ve seconds prior to energizing the compressor. Also, the fan off delay allows for “free cooling” by utilizing the already cool indoor
coil to its maximum capacity by running for 30 seconds after the compressor.
VPAK units are thermostat controlled.
The new Friedrich digital VPAK features a self diagnostic program that can alert maintenance to compo-
nent failures or operating problems. The internal diagnostic program saves properties valuable time when
diagnosing running problems.
The self diagnosis program will also store error codes in memory if certain conditions occur and correct
themselves such as extreme high or low operating conditions or activation of the room freeze protection
feature. Storing error codes can help properties determine if the unit faced obscure conditions or if an error
occurred and corrected itself.
When the VPAK senses that the indoor room temperature has fallen to 40°F the unit will cycle on high fan
and the electric strip heat to raise the room temperature to 46°F then cycle off again. This feature works
regardless of the mode selected and can be turned off. The control will also store the Room Freeze cycle
in the service code memory for retrieval at a later date. This feature ensures that unoccupied rooms do not
reach freezing levels where damage can occur to plumbing and xtures.
Multiple compressors starting at once can often cause electrical overloads and premature unit failure.
The random restart delay eliminates multiple units from starting at once following a power outage or initial
power up. The compressor delay will range from 180 to 240 seconds.
The new Friedrich VPAK uses a digital thermostat to accurately monitor the outdoor coil conditions to allow
the heat pump to run whenever conditions are correct. Running the VPAK in heat pump mode save energy
and reduces operating costs. The digital thermostat allows maximization of heat pump run time.
Instant Heat
Heat Pump Mode
Emergency Heat
Override
Desk Control Ready
Indoor Coil Frost
Sensor
Ultra-Quiet Air
System
High Efciency
Rotary Compressor
Auxiliary Fan Ready
Heat pump models will automatically run the electric heater during compressor lock-out to quickly provide
heat when initially energized, then return to heat pump mode. This ensures that the room is heated quickly
without the usual delay associated with heat pump units.
In the event of a compressor failure in heat pump mode the compressor may be locked out to provide heat
through the resistance heater. This feature ensures that even in the unlikely event of a compressor failure
the room temperature can be maintained until the compressor can be serviced.
All electronic VPAK units have low voltage terminals ready to connect a desk control energy management
system. Controlling the unit from a remote location like the front desk can reduce energy usage and
requires no additional accessories at the VPAK.
The frost sensor protects the compressor from damage in the event that air ow is reduced or low outdoor
temperatures cause the indoor coil to freeze. When the indoor coil reaches 30
diabled and the fan continues to operate based on demand. Once the coil temperature returns to 45°F the
compressor returns to operation.
The VPAK series units feature a indoor fan system design that reduces sound levels without
lowering airow and preventing proper air circulation.
The VPAK benets quality components and extensive development to ensure a quiet, efcient and
dependable unit.
High efciency rotary compressors are used on all Friedrich VPAKs to maximize durability and efciency.
The VPAK features a 24V AC terminal for connection to an auxiliary fan that may be used to transfer air to
adjoining rooms. Auxiliary fans can provide conditioning to multiple rooms.
°F the compressor is
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Low fan
High fan
Fan only
Power
Temp
Temp
Cool
Heat
1 2 3 4 5 6 7 8
O
N
Electronic Control Configuration
The adjustable control dip switches are located at the lower
left hand portion of the digital Smart Center. The inputs are
only visible and accessible with the front cover removed from
the Unit.
Factory Dip Switch Configuration
Dip Switch Setting
Switches 1-4 ON
Switch 5-7 OFF
Switch 8 ON
Room Freeze Protection – Switch 6
Units are shipped from the factory with the room freeze protection disabled. Room Freeze Protection can be switched on at
the owner’s preference by moving Dip Switch 6 to ‘ON’. This
feature will monitor the indoor room conditions and in the event
that the room falls below 40°F the unit will cycle on high fan with
the electric heater. This occurs regardless of mode.
Emergency Heat Override – Switch 7
Units are shipped from the factory with the room emergency
heat override disabled. In the unlikely event of a compressor
failure a heat pump unit may be switched to operate in only the
electric heat mode until repairs can be made, by moving Dip
Switch 7 to ‘ON’.
Discharge Air Sensor Override – Switch 8
This switch MUST remain in the “ON” position for Vert-I-Pak
models, since they do not use a discharge air sensor. If the
switch is positioned in the “OFF” position on these models it
will result in the erroneous display Error Code 14 indicating that
the Discharge air temperature sensor is open or shorted.
Note: In order for the control to recognize “Dip” switch
setting changes, the unit must be disconnected
from power supply when making any configuration
changes.
Error Code Diagnostics
The VPAK electronic control continuously monitors the Vert-I-Pak
unit operation and will store error codes if certain conditions
are witnessed. In some cases the unit may take action and shut
the unit off until conditions are corrected.
To access the error code menu press the ‘HEAT’ and ‘HIGH
FAN’ buttons simultaneously for three seconds. If error codes
are present they will be displayed. If multiple codes exist you
can toggle between error codes using the temp up ▲ button. To
clear all codes press the temp down ▼ button for three seconds
while in the error code mode. To exit without losing codes
press the ‘Low Fan’ button.
Button Location for Vert-I-Pak Models
With the remote thermostat escutcheon installed, the button
locations to access the diagnostics mode can be located as
shown below.
Electronic Control Error Code
Diagnostics and Test Mode
* Heat and high fan - access error codes
* Temp up ▲ and temp down ▼ - toggle between error codes
* Low fan - exit error code mode without losing stored error
codes.
* Temp down ▼ - clears all error codes
NOTE: Hold buttons down for three seconds.
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