Friedrich VERT-I-PAK R410A Guide

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)A18K50L-*
V(E, H)A24K25L-* V(E, H)A24K34L-* V(E, H)A24K50L-*
V(E, H)A24K75L-* V(E, H)A24K10L-*
VPK-ServMan-L (4-11)
2011-2012 Service/Parts Manual
L-B Suffix, R410A Models
ASeries (Electronic Controls)
Single Package Vertical Air Conditioning System
9-18K 24K
*Last Character May Vary

1
Table of Contents
2-4
4
5
5
6
7
8
8
9
10-11
12
13
14
15
16
17
18
19-22
23
24
24
22-23
25
26
26
27
Important Safety Information ...........................................
Introduction .........................................................................
Vert-I-Pak Model Number Identification Guide ...................
Serial Number Identification Guide ....................................
Electrical Requirements .....................................................
Chassis Specifications .......................................................
Cooling Performance Data .................................................
Extended Cooling Performance .........................................
Electronic Control Features ..............................................
Electronic Control Sequence of Operation ...................
Low Voltage Interface Connections ..................................
Service ..............................................................................
VPAK 9-18 BTU Units Components Identification ............
VPAK 9-18 BTU Units Components Identification ............
Error Codes and Alarm Status ..........................................
Components Testing .........................................................
Electronic Control Board Components Identification ........
Components Testing (Continued) ................................
Refrigerant Sequence of Operation .................................
Sealed Refrigeration System Repairs ..............................
Refrigerant Charging ........................................................
Method Of Charging ....................................................
Undercharged Refrigerant Systems .................................
Overcharged Refrigerant Systems ...................................
Restricted Refrigerant Systems .......................................
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 ................
Compressor Replacement .....................................
Routine Maintenance ..................................................
Unit Performance Test Data Sheet ..............................
Thermistor Resistance Values .....................................
Troubleshooting Charts ..........................................
Remote Wall Thermostat Wiring Diagrams .................
Electrical and Thermostat Wiring Diagrams ...........
Accessories .................................................................
Warranty ......................................................................
VPAK 9-18K Parts ..................................................
VPAK 24K Parts .....................................................
Technical Support/Contact Info ...................................
28
28
28
29
29-30
30
30
30
30
30
30
30
31
31
32-33
33
34
35
36-39
40
41-46
47
48
50-53
54-58
59

IMPORTANT SAFETY INFORMATION
The information contained in this manual is intended for use by a qualified 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 unqualified persons can result in subjecting the unqualified 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.
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 qualified 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.
Your safety and the safety of others are very important.
We have provided many important safety messages in this manual and on your appliance. Always read,
understand and obey all safety messages.
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.
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.
WARNING
CAUTION
NOTICE
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 specified amperage rating.•
Use on a properly grounded electrical circuit only.•
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 flame or hot•
surfaces can cause serious burns.
Make sure to protect personal and surrounding property with fire proof materials.•
Have a fire extinguisher at hand while using a torch.•
Provide adequate ventilation to vent off toxic fumes, and work with a qualified assistant whenever•
possible.
Always use a pressure regulator when using dry nitrogen to test the sealed refrigeration system for•
leaks, flushing 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 fins 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

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 specified amperage rating.•
Connect to a properly grounded electrical circuit only.•
Do not use extension cords with the unit.•
Failure to follow these instructions can result in fire 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 is level 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.
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: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 Identification.)

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
L; MARKETING SUFFIX
Indicates Modification (subject to change)
B; ENGINEERING SUFFIX
Indicates Modification (subject to change)
RT = Standard Wired Remote
T-stat Operation
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 18 K 50 RT L-B
Model Identification Guide
Sample Nameplate (see your chassis nameplate)
120524
COOLING EQUIPMENT
FOLLOWING ITEMS
OUTDOOR GRILLE
INDOOR GRILLE
SAMPLE
A A A N 00001
AK = 2010 AE = 2015
AA = 2011 AF = 2016
AB = 2012 AG = 2017
AD = 2014 AJ = 2019
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
REBMUNNURNOITCUDORPDERUTCAFUNAMRAEY
5

Wire Size
ELECTRICAL REQUIREMENTS
Unit MUST
Supply voltage
For VPAK Cool with Electric Heat 9-18K
ELECTRIC SHOCK HAZARD
WARNING
Turn off electric power before service or instal-
lation. 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.
NOTICE
Not following the previous WARNING could result
in fire or electrically unsafe conditions which could
cause moderate or serious property damage.
Read, understand and follow the previous warning.
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. Proper
current protection to the unit is the responsibility of the owner”.
Heater Watts 2500/2050 3400/2780 5000/4090 2500/2050 3400/2780 5000/4090 2500/2050 3400/2780 5000/4090
Voltage
Heating BTU/h 8500/7000 11600/9500 17000/13900 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 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 15 19.9 28.6
Branch Circuit Fuse (Amps) 15 20 30 15 20 30 15 20 30
LRA - Compressor (Amps) 22 22 22 30 30 30 42 42 42
Cooling Current (Amps) 4.2/4.4 4.2/4.4 4.2/4.4 5.2/5.4 5.2/5.4 5.2/5.4 8 1/8.. 6 8 1/8.. 6 8 1/8.. 6
Basic heater Size 2.5 Kw 3.4 Kw 5.0 Kw 2.5 Kw 3.4 Kw 5.0 Kw 2.5 Kw 3.4 Kw 5.0 Kw
Power Connection
230/208 230/208 230/208
VEA09K VEA12K VEA18K
HARD WIRED HARD WIRED HARD WIRED
Electrical Data
Recommended Branch
Circuit Wire Sizes **
* AWG-American Wire Gauge
14 12 10 14 12 10 14 12 10
For VPAK Heat Pumps 9-18K
All 208/230v chassis must be hard wired with properly sized breaker. See nameplate for specific chassis electrical
requirements. See below for unit wiring. For wall thermostat wiring, see page 12.
Use HACR type breakers to avoid
nuisance trips. All field wiring must be done in accordance with NEC and local codes.
Heater Watts 2500/2050 3400/2780 5000/4090 2500/2050 3400/2780 5000/4090 2500/2050 3400/2780 5000/4090
Voltage
Heating BTU/h 8500/7000 11600/9500 17000/13900 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 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 15 19.9 28.6
Branch Circuit Fuse (Amps) 15 20 30 15 20 30 15 20 30
LRA - Compressor (Amps) 18.5 18.5 18.5 26 26 26 42 42 42
Cooling Current (Amps) 4.1/4.3 4.1/4.3 4.1/4.3 5.3/5.5 5.3/5.5 5.3/5.5 8.2/8.6 8.2/8.6 8.2/8.6
Basic heater Size 2.5 Kw 3.4 Kw 5.0 Kw 2.5 Kw 3.4 Kw 5.0 Kw 2.5 Kw 3.4 Kw 5.0 Kw
Power Connection
032/802802/032802/032
DERIWDRAHDERIWDRAHDERIWDRAH
VHA09K
VHA12K
VHA18K
Electrical Data
Recommended Branch
Circuit Wire Sizes
* AWG-American Wire Gauge
0141012141 01214121
6

Chassis Specifications
Model 2011 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(TNERRUCGNITAEH
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.FSPMA
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(ROTOMROODTUO
58.058.0)A(ROTOMROODTUO
AIRFLOW DATA
INDOOR CFM* 300 350 450 610 300 420 450 610
0606060606060606
MFCTNEV
"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
Heater Watts 2500/2050 3400/2780 5000/4090 7500/6135 10000/8180 2500/2050 3400/2780 5000/4090 7500/6135 10000/8180
Voltage
Heating BTU/h 8500/7000 11600/9500 17000/13900 25598/20939 34130/27918 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 32.6/29.5 43.5/39.3 10.9/9.9 14.8/13.4 21.7/19.7 32.6/29.5 43.5/39.3
Minimum Circuit Ampacity 17.2/15.9 22.1/20.3 30.7/28.1 44.3/40.3 57.9/52.7 17.2/15.9 22.1/20.3 30.7/28.1 44.3/40.3 57.9/52.7
Branch Circuit Fuse (Am ps) 25 25 30 45 60 25 25 30 45 60
LRA - Compressor (Amps ) 34.8 34.8 34.8 34.8 34.8 34.8 34.8 34.8 34.8 34.8
Cooling Current (Amps) 10.0/10.4 10.0/10.4 10.0/10.4 10.0/10.4 10.0/10.4 10.6/10.9 10.6/10.9 10.6/10.9 10.6/10.9 10.6/10.9
Basic heater Size 2.5 Kw 3.4 Kw 5.0 Kw 7.5 Kw 10.0 Kw 2.5 Kw 3.4 Kw 5.0 Kw 7.5 Kw 10.0 Kw
Power Connection
Recommended Branch
Ci** rcuit Wire Sizes* AWG -
American Wire Gauge
10 10 10 6 4 10 10 10 6 4
HARD WIRED HARD WIRED
VEA24K VHA24K
230/208230/208
Electrical Data
For VPAK Cool with Electric Heat 24K For VPAK Heat Pumps 24K
7

Extended Cooling Performance Data
Model #
Model #
Cooling Performance Data
TECHNICAL SERVICE DATA
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
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 65.0
VHA09K**RTL 230/208 4.1 57 23 117 155 62 12 20 155 405 39.0
VHA12K**RTL 230/208 5.3 55 25 119 165 65 15 23 145 450 42.0
VHA18K**RTL 230/208 8.2 51 29 129 190 60 14 35 133 465 45.0
VHA24K**RTL 230/208 10.6 51 29 128 174 60 12 32 140 480 74.0
¹Test Conditions: 80º F, Room Air Temperature with 50% Relative Humidity, and 95º F, Outdoor Air Temperature with 40% Relative Humidity
**Denotes Heater KW - Numbers Vary
Sub-Cooling
OPERATING
PRESSURES
SERVICE DATA
Cooling¹
INDOOR COIL
TEMPERATURE
º F
OUTDOOR COIL
TEMPERATURE
º F
Discharge Line
Temperature
º F
ELECTRICAL
RATINGS
R-410A - Oz.Voltage
Refrigerant
Charge
Supply Air Temperature
Drop Suction DischargeAmps
Suction Line
Temperature
º F
Super Heat
8

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 specifically 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 benefit to the owner.
Quiet Start/Stop
Fan Delay
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 five seconds prior to en-
ergizing 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.
Remote Thermostat
Operation VPAK units are controlled by a wired remote wall thermostat.
Internal Diagnostic
Program
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.
Service Error Code
Storage
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.
Random
Compressor Restart
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.
Heat Pump Units
Digital Defrost
Thermostat
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
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.
Room Air
Sampling Feature
The room air sampling feature maintains a balanced temperature throughout the room by circulating the
air for 90 seconds once every 9 minutes that the unit is not running when it is set to cooling or heating
mode. By circulating the air, the unit can detect hot or cold areas in the room and operate the unit to cool
or warm the room as necessary. This function is only available when the fan mode is set to ‘AUTO’ during
COOL or HEAT Mode.
Desk Control Ready
All electronic VPAK units have low voltage terminals ready to connect a desk control energy management
system. Controlling the unit’s on/off operation from a remote location like the front desk can reduce energy
usage and requires no additional accessories at the VPAK.
Indoor Coil Frost
Sensor
The frost sensor protects the compressor from damage in the event that airfl ow is reduced or low outdoor
temperatures cause the indoor coil to freeze. When the indoor coil reaches 30°F the compressor is
diabled and the fan continues to operate based on demand. Once the coil temperature returns to 45°F the
compressor returns to operation.
Auxiliary Fan Ready The VPAK features a 24V AC terminal for connection to a relay that may be used to operate an auxiliary
fan to transfer air to adjoining rooms. Auxiliary fans can provide air conditioning to odd shaped rooms.
9

The
Note: Unit is operated by a wired remote wall t-stat which is connected to an electronic control board
at the VPAK unit.
Heat Mode in Cool with Electric Heat Units
Heat Pump With Electric Heat Operation
If the Compressor is Locked Out on the 3 Minute Time Delay and Electric Heat is Available
Condition 1
set point of the t-stat if
(Compressor Heat)
Heat / Cool Units
This heating has two heating methods. If the ambient indoor temperature is below the heat set point and the
compressor is not locked out, the compressor turns on. If the ambient temperature rises above the t-stat’s heat set
point, the compressor turns off.
1. The control turns on the electric heat until the compressor is not locked out.
2. After lockout, the control turns off the electric heat, waits 5 seconds, then turns on the compressor.
(The wired remote wall t-stat’s time delay may override this feature).
When the t-stat is in the Heat Mode, if the indoor ambient temperature is below the heat set point, the fan turns on
5 seconds prior then the electric heat will turn on. When the t-stat is satisfied, the electric heat will turn off. The fan
turns off 15 seconds later.
Thereafter, the unit will switch back to Heat Pump
45 or greater.
heat until the outdoor coil temperature sensor rises to
10

Compressor Lock Out Time
The lockout feature ensures that the compressor is de-energized for a period of time. The timer varies randomly
from 180 to 240 seconds
The compressor lockout is initiated every time the compressor is “off” due to:
(1) Satisfying the T-stat temperature set point
(2) Changing mode to fan only or heat
(3) Turning the unit off
(4) Power is restored after failure
(5) Line power is restored from a brown out condition
Cooling Fan Delay
This is only for t-stat Fan Auto Mode only.
When unit cycles cooling ON – starts the fan 5 seconds EARLY. When unit cycles cooling OFF – DELAYS the fan
off for 30 seconds
Heating Fan Delay
This is only for Fan Auto Mode (Fan cycles with cool/heat operation) and not for continuous fan mode. When unit
cycles Heating ON – starts the fan 5 seconds EARLY. When unit cycles Heating OFF – DELAYS the fan off for 15
seconds.
Continuous fan operation enables fan to run continuously.
Fan Speed Change Delay
Relay activation is delayed by a minimum number of seconds. The default for this value is 2 seconds and is used to
eliminate relay chatter.
Room Air Sampling Feature
The room air sampling feature maintains a balanced temperature throughout the room by circulating the air for 90
seconds once every 9 minutes that the unit is not running when it is set to cooling or heating mode. By circulating
the air, the unit can detect hot or cold areas in the room and operate the unit to cool or warm the room as neces-
sary. This function is only available when the fan mode is set to ‘AUTO’ during COOL or HEAT Mode.
11

ELECTRIC SHOCK HAZARD
WARNING
Disconnect power to the unit before
servicing. Failure to follow this warning
could result in serious injury or death.
Low Voltage Interface Connections
All Vert-I-Pak units have a low voltage interface connector through
which a Remote Wall Thermostat, Desk Control and Auxiliary Fan’s
Relay can be connected. The interface connector is located on the
Questions concerning proper connections to the unit should be dirrected
to the factory.
electronic control board.
Interface Connector Definitions
Interface Connector LocationFigure 1
Table 1
FP
F2
F1
D2
D1
C
GH
GL
B
Y
W
R
Factory use only.
(Ensure there is no jumper at FP an F2)
Used with F1 to provide 24 VAC to external
fan relay. (Ensure there is no jumper at FP an F2)
Used with F2 to provide 24 VAC to
external fan relay.
Used with D1 for desk control on or off
operation.
Used with D2 for desk control on or off
operation.
Common Ground Terminal
Call for high fan
Call for low fan
Call for compressor
Call for heating
24V Power from Electronic Control to Wall
Call for heat pump reversing valve
Remote Wall Thermostat
All Friedrich Vert-I-Pak units are factory configured to be controlled by
using a single stage heat/cool remote wired wall mounted thermostat.
Thermostat Selection
Friedrich recommends the use of the Friedrich RT4 and RT6. These
thermostats are single stage heat/cool, manual changeover. The RT4 is a
digital display thermostat with single speed fan control. The RT6 features
a digital display, two fan speed selection, temperature limiting, status
indicator light, room temperature offset, and backlight. Other thermostats
may be used as long as they are single stage heat/cool
and are
configured correctly for the unit.
Thermostat terminals requirements:
.
For cooling with electric heat units: C, R, G, Y, W.
For heat pump units: C, R, G, Y, W, B.
For two fan speeds, thermostat must have 2 fan speed selection.
During Heat Mode:
HEAT PUMP UNITS
The B terminal must be continuously energized. The W terminal must have
24 VAC output to call for heat. The control board decides on whether to
turn on the Heat Pump Heat (compressor) or Electric Heat. The Y terminal
should not have 24 VAC output during heat mode.
Connect the thermostat using Figure 1 and Table 1 as a guide.
Procedure (Ensure there is no jumper wire at FP and F2)
1) Disconnect power to the unit.
2) Unscrew and remove the electrical control box’s cover.
3) Locate the Interface Connector (24 VAC terminal strip (See figure 1 at left).
4) Make the wire connections according to the configuration needed for
your unit (see above or page 40 for wiring diagrams). Use #18 gauge wire size.
5) Once each wire is matched and connected, the unit is now ready to be
controlled by the thermostat.
6) Reattach the electrical control box’s cover.
Connecting a Remote Wall
Thermostat
12

SERVICE
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
WARNING
Turn off electric power before service or
installation.
Extreme care must be used, if it becomes
necessary to work on equipment with power
applied.
Failure to do so could result in serious injury or
death.
Servicing / Chassis Quick Changeouts
.
Warranty
To Remove the Chassis from the Closet:
B. Switch the wall Thermostat off.
C. Pull the Power Disconnect located in the front of the chassis.
A. Disconnect the power coming into the unit from the main
breaker panel or the closet mounted disconnect.
D. Disconnect the electrical connection.
E. Disconnect the duct work.
G. Slide the chassis out of the wall plenum.
F. Disconnect condensate drain on 9-18,000 BTU models.
H. Lift the chassis out of the utility closet.
13
Remote Wall Thermostat 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
appliances, windows etc.. The thermostat should be located about 5 Ft.
above the floor in an area of average temperature, with good air circulation.
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.
Note: An improperly operating or poorly located remote wall thermostat
can be the source of perceived equipment problems. A careful check of the
thermostat’s location and wiring must be made then to ensure that it is not
the source of problems.
Desk Control
The unit’s electronic control 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 (See page 12). Whenever the
switch closes, the unit operation will stop.
Maximum Wire Length for Desk Control Switch
Auxiliary Fan Control
The electronic control also has the ability to control a 24 VAC relay to
activate an auxiliary, or transfer fan. The outputs are listed as F1 and F2 on
the interface connector (See page 12).
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 24 VAC
signal to the relay. The relay must be 24 VAC, 50mA or less.
Note: The Desk Control, Auxiliary Fan relay and wires must be field supplied.

VPAK 9-18K BTU UNITS
COMPONENTS IDENTIFICATION
14
Air Intake
Ground
Front Side
Blower Wheel and
Heater in here
10” Duct Collar
Right Side
Left and Front Sides
Left and Back Sides
Condenser
Heater
Diagnostic
Touch Pad
Fresh Air
Vent
Evaporator
Coil
Condenser
Coil Thermistor
Evaporator
Coil Thermistor
Compressor
Evaporator Coil
Pullout
Disconnect
Compressor
Blower/Fan
Motor Capacitor
Heater
Blower
Wheel
Condenser
Air Intake
Blower/Fan
Motor
Condenser
Fan Shroud
Fresh Air
Vent Door
Nameplate Air Discharge
Condenser
Condenser
Air Discharge

VPAK 24K BTU UNITS
COMPONENTS IDENTIFICATION
15
Front Side
Left and Back Sides Right Side
Air Intake
Condenser
Air Discharge
Condenser Air Intake
Pull Out
Disconnect
Diagnostic
Touch Pad
Compressor
Contactor
10” Duct Collar Air Discharge Blower Wheel
Electric
Control Panel
Return
Air Filter
Fresh Air
Door Lever
Electronic
Control Board
Nameplate
Heater
Blower Wheel
Compartment
Evaporator Coil
Thermistor
Compressor
Capacitor
Blower/
Condenser
Fan Motor
Capacitor
Fresh Air
Door
Condenser
Fan Motor
Condenser
Fan Blade
Condenser
Shroud
Condenser
Compressor
Capillary Tube
Evaporator Coil
Condensate Drain Hose
Condenser
Condenser Coil Thermistor

16
Error Codes and Alarm Status
Unit Control Panel
The display shown below has four digits. The left two digits indicate the error code # ( 1 to 24 ), The On/Off icons above these
two digits indicate the currents state of the error code. The right two digits show the history count (up to 99) of the associated
error code. The display contains a maintenance icon (wrench) that will illuminate to indicate when the unit needs service.
This wrench indicates an error code # is on (active). To find out which one, check all error codes.
Check Error Codes
Clear History Counters
1. Press the Enter key to activate the
display.
2. Each press of the scroll key display
the next error code.
1. Press & hold the Enter key and the
Scroll Key for 6 seconds.
Error
Code Problem
Action
1 Front Panel Button Stuck For More Than 20 Seconds Continue to monitor for "OPEN" (Unstuck) switch. Do not process switch input.
2 Input Voltage Out of Specification (187 - 253) Unit stops, open all relays until voltage is back within specs then resume operation.
3 Indoor Temperature Sensor is Open or Shorted Unit defaults to 75°F in COOLING or 68°F in HEATING and will continue to operate
4 Indoor Coil Temperature Sensor is Open or Shorted
The unit's control board defaults to 40°F. It will override the sensor and the unit will
continue to operate.
5 Outdoor Coil Temperature Sensor is Open or Shorted
The unit defaults to 20°F, overriding the sensor. The unit will continue to operate.
Using Elec Heat if available for HEATING. If not available, it will use HEAT PUMP if
the outdoor temperature allows.
6 Outdoor Coil > (grater than) 175 F
The unit will shut down for 5 minutes. resume operation for 3 minutes. If test fails 3
times, the unit opera
turn power off and on.
tion is locked out. See troubleshooting page 42. To reset,
7 Indoor Coil < (less than) 30 F for 2 consecutive minutes
The compressor will turn off and the High Fan speed will run. When coil temp reachs
45°F the unit will resume operation after lockout time.
8 Unit Cycles > (greater than) 9 Times per hour
The unit will continue to operate and be monitored.
9 Unit Cycles < (less than) 3 Times per Hour The unit will continue to operate and be monitored.
11 WallStat Problem or Connection Issue The unit will not operate.
12 Not Applicable
10 Not Applicable
Not Applicable
Not Applicable
13 High Pressure Limit Switch is Open
VPAK 24K Unit Only
If unit is cooling or heat pump is on, shut down compressor. Run high fan until
switch closes, then resume operation. The third occurance in 1 hour locks unit out.
Applicable to 24K unit only. To reset, turn power off and on.
14 Not Applicable Not Applicable
15 Heat Pump Error
Occurs if the indoor ambient temperature range falls below 0°F or greater than 130°F. The
error code will remain on until the temperature reaches the operating range and then
the unit will return to normal operation.
17 Equipment Doesn't Meet Minimum Configuration The compressor must be enabled and have at least 2 fan speeds.
18 Not Applicable
Not Applicable Not Applicable
Not Applicable
19 Not Applicable Not Applicable
20 Not Applicable Not Applicable
21 Not Applicable Not Applicable
22
Outdoor Coil Temperature < 30 F for 2 consecutive
(Not an error code)
minutes
Unit will use electric heat to satisfy heating demands until the temperature equals or
exceeds 45°F. Applicable for Heat Pump models only.
23
24 Not Applicable Not Applicable
if setting is below 75°F in cool mode or if above 68°F in heat mode.
16 Temperature beyond operating limits
If indoor coil temperature is less than ambient temperature for 3 minutes, the unit will
use electric heat to satisfy the heating demand. Causes could be bad reversing
valve, heat load too high.

17
COMPONENTS TESTING
Testing the Diagnostic Service Module
Testing the Electronic Control Board
If the Diagnostic Service Module does not turn on:
1. Make sure there is 208/230 VAC to the unit and that it is turned on.
2. Disconnect the diagnostic service module’s wire harness on the control board.
3. Using a voltmeter, check the first two pins to the left of the female connector (see picture below). There
should be up to 5VDC.
4. If there is no voltage, replace the electronic control board.
5. If there is voltage, check the wire harness and connections at the electronic control board and the diagnostic
service module.
6. If the connections and the wire harness are good, replace the diagnostic service module.
Diagnostic Service Module Service Module Connector
Test here up to 5VDC.
If no voltage, replace board.
If there is 5VDC, check connections
and cable. If OK, replace service module.
ELECTRIC SHOCK HAZARD
WARNING
Turn off electric power before service or
installation. Extreme care must be used, if it
becomes necessary to work on equipment with
power applied.
Failure to do so could result in serious injury or
death.

ELECTRONIC CONTROL BOARD COMPONENTS IDENTIFICATION
AND TESTING (Continued) (See wiring diagrams pages 41-46)
Front
Sample board for Kuhl+ unit
Back
VPAK 24K
High Pressure Switch
Reversing Valve
High Speed
Low Speed
T-stat Terminals
Transformer voltage
Selector Switch
115/230 Volts
Ensure it is set at
230VAC
Not Used
Not Used
Not Used
Diagnostic
Service Module
Transformer
115/230 Volts
Fuse 10 Amps
250 VaC
Low Voltage Interface Connection
FP F2 F1 D2 D1 C GH GL B Y W R
(Blue)
(Green)
Not Used
Not Used
Not Used
1. Test for power at L1 and L2 for 208/230 VAC. (Ensure the transformer voltage selector switch is set for 230 VAC)
2. Test the 10 amp/250 VAC fuse for continuity.
FOR THE FOLLOWING TESTS, ENSURE THE UNIT IS IN THE APPROPRIATE SETTINGS FOR THE TEST
BEING PERFORMED. ENSURE THERE ARE NO ERROR CODES ACTIVE.
3. Testing the compressor relay and heat relays:
Test for power in and power out. If there is power in and no power out, replace the electronic control board.
(208/230 to L2)
4. Testing the fan and reversing valve relays:
Test for power at the reversing valve and fan relays 1 or 3. (208/230 to L2)
5. Testing the transformer:
Test the low voltage terminal strip at:
R and C for 24 VAC
F2 and F1 for 24 VAC
D2 and D1 for 24 VAC
Test the service module connector for 5 VDC (see prior page)
Test the connectors for the thermistors for up to 5 VDC
If there is no voltage at any of the above, replace electronic control board.
6. Testing the thermistors:
Disconnect the thermistor and test for resistance value (see page 35)
7. Testing the high pressure switch (VPAK 24K only)
Test for 24 VAC at board, if there is no voltage, replace the electronic control.
Test the pressure switch for continuity, if none, replace it (switch is normally closed)
18

BLOWER / FAN MOTOR TEST
BLOWER / FAN MOTOR
A single phase permanent split capacitor motor is used to drive
the evaporator blower and condenser fan. A self-resetting
overload is located inside the motor to protect against high
temperature and high amperage conditions.
ELECTRIC SHOCK HAZARD
WARNING
Disconnect power to the unit before
servicing. Failure to follow this warning
could result in serious injury or death.
1. Visually inspect the motor’s wiring, housing etc., and
determine that the capacitor is serviceable.
2. Make sure the motor has cooled down.
3. Disconnect the fan motor wires from the control board.
4. Test for continuity between the windings also, test to
ground.
5. If any winding is open or grounded replace the motor.
CAPACITORS
ELECTRIC SHOCK HAZARD
WARNING
Turn off electric power before servicing.
Discharge capacitor with a 20,000 Ohm 2 Watt
resistor before handling.
Failure to do so may result in personal injury,
or death.
Capacitor Check with Capacitor Analyzer
The capacitor analyzer will show whether the capacitor
is “open” or “shorted.” It will tell whether the capacitor
is within its micro farads rating and it will show whether
the capacitor is operating at the proper power-factor
percentage. The instrument will automatically discharge
the capacitor when the test switch is released.
Capacitor Connections
The starting winding of a motor can be damaged by a
shorted and grounded running capacitor. This damage
usually can be avoided by proper connection of the running
capacitor terminals.
From the supply line on a typical 230 volt circuit, a 115 volt
potential exists from the “R” terminal to ground through a
possible short in the capacitor. However, from the “S” or start
terminal, a much higher potential, possibly as high as 400
volts, exists because of the counter EMF generated in the
start winding. Therefore, the possibility of capacitor failure
is much greater when the identified terminal is connected
to the “S” or start terminal. The identified terminal should
always be connected to the supply line, or “R” terminal,
never to the “S” terminal.
When connected properly, a shorted or grounded running
capacitor will result in a direct short to ground from the “R”
terminal and will blow the line fuse. The motor protector
will protect the main winding from excessive temperature.
COMPONENTS TESTING (Continued)
Many motor capacitors are internally fused. Shorting the
terminals will blow the fuse, ruining the capacitor. A 20,000
ohm 2 watt resistor can be used to discharge capacitors
safely. Remove wires from capacitor and place resistor
across terminals. When checking a dual capacitor with
a capacitor analyzer or ohmmeter, both sides must be
tested.
19