York DM120 Installation Manual Page 73
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- Table of contents
- TROUBLESHOOTING
- BOOKMARKS
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264973-YIM-A-0806
Unitary Products Group 73
TROUBLESHOOTING
PREDATOR
®
FLASH CODES
Various flash codes are utilized by the unit control board
(UCB) to aid in troubleshooting. Flash codes are
distinguished by the short on and off cycle used
(approximately 200ms on and 200ms off). To show normal
operation, the control board flashes a 1 second on, 1 second
off "heartbeat" during normal operation. This is to verify that
the UCB is functioning correctly. Do not confuse this with an
error flash code. To prevent confusion, a 1-flash, flash code
is not used.
Alarm condition codes are flashed on the UCB lower left Red
LED, See Figure 30. While the alarm code is being flashed, it
will also be shown by the other LEDs: lit continuously while
the alarm is being flashed. The total of the continuously lit
LEDs equates to the number of flashes, and is shown in the
table. Pressing and releasing the LAST ERROR button on
the UCB can check the alarm history. The UCB will cycle
through the last five (5) alarms, most recent to oldest,
separating each alarm flash code by approximately 2
seconds. In all cases, a flashing Green LED will be used to
indicate non-alarm condition.
In some cases, it may be necessary to "zero" the ASCD for
the compressors in order to perform troubleshooting. To reset
all ASCDs for one cycle, press and release the UCB TEST/
RESET button once.
Flash codes that do and do not represent alarms are listed in
Table 80.
Troubleshooting of components may require open-
ing the electrical control box with the power con-
nected to the unit. Use extreme care when
working with live circuits! Check the unit name-
plate for the correct line voltage and set the voltme-
ter to the correct range before making any
connections with line terminals.
When not necessary, shut off all electric power to the
unit prior to any of the following maintenance proce-
dures so as to prevent personal injury.
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and dan-
gerous operation which could cause injury to person
and/or damage unit components. Verify proper oper-
ation after servicing.
TABLE 80: UNIT CONTROL BOARD FLASH CODES
FLASH CODE DESCRIPTION
GREEN
LED
16
RED
LED
8
RED
LED
4
RED
LED
2
RED
LED
1
On Steady This is a Control Failure - - - - -
1 Flash Not Applicable - - - - -
2 Flashes
Control waiting ASCD
1
1.
Non-alarm condition.
Flashing Off Off On Off
3 Flashes HPS1 Compressor Lockout Off Off Off On On
4 Flashes HPS2 Compressor Lockout Off Off On Off Off
5 Flashes LPS1 Compressor Lockout Off Off On Off On
6 Flashes LPS2 Compressor Lockout Off Off On On Off
7 Flashes FS1 Compressor Lockout Off Off On On On
8 Flashes FS2 Compressor Lockout Off On Off Off Off
9 Flashes Ignition Control Locked Out / Ignition Control Failure Off On Off Off On
10 Flashes
Compressors Locked Out on Low Outdoor Air Temperature
1
Flashing On Off On Off
11 Flashes
Compressors locked out because the Economizer is using free
Cooling
1
Flashing On Off On On
12 Flashes Unit Locked Out due to Fan Overload Switch Failure Off On On Off Off
13 Flashes
Compressor Held Off due to Low Voltage
1
Flashing On On Off On
14 Flashes EEPROM Storage Failure Off On On On Off
OFF No Power or Control Failure Off Off Off Off Off
- INSTALLATION 1
- TABLE OF CONTENTS 2
- LIST OF FIGURES 3
- LIST OF TABLES 3
- LIST OF TABLES (CONT’D) 4
- SAFETY CONSIDERATIONS 5
- INSPECTION 5
- REFERENCE 6
- RENEWAL PARTS 6
- APPROVALS 6
- 6.5-12.5 Ton York 7
- Model Number Nomenclature 7
- LIMITATIONS 9
- LOCATION 10
- FIGURE 4 - PREDATOR 10
- RIGGING AND HANDLING 11
- FIGURE 5 - UNIT 4 POINT LOAD 11
- TABLE 3: UNIT WEIGHTS 11
- TABLE 4: 4 POINT LOAD WEIGHT 11
- FIGURE 6 - UNIT 6 POINT LOAD 12
- CLEARANCES 12
- TABLE 5: 6 POINT LOAD WEIGHT 12
- See Detail 13
- CABINET SIZE 14
- DIMENSION 14
- “A” “B” “C” 14
- 50 3/4” 28 1/4 18 1/16 28 1/4 14
- 42” 27 3/4 12 1/16 27 1/2 14
- F R O N T 15
- R I G H T 15
- O P T I O N A L C O I L 16
- G U A R D 16
- 3 " M i n i m u m 16
- THERMOSTAT WIRING 17
- POWER AND CONTROL WIRING 17
- POWER WIRING DETAIL 17
- TABLE 8: CONTROL WIRE SIZES 17
- U N I T C O N T R O L 18
- B O A R D 18
- 264973-YIM-A-0806 19
- Unitary Products Group 19 19
- 20 Unitary Products Group 20
- Unitary Products Group 21 21
- 22 Unitary Products Group 22
- Unitary Products Group 23 23
- 24 Unitary Products Group 24
- Unitary Products Group 25 25
- 26 Unitary Products Group 26
- Unitary Products Group 27 27
- 28 Unitary Products Group 28
- Unitary Products Group 29 29
- TABLE 29: DM PHYSICAL DATA 30
- TABLE 30: DH PHYSICAL DATA 30
- O P T I O N A L 31
- S H O W N 31
- OPTIONS/ACCESSORIES 33
- FIRE OR EXPLOSION HAZARD 33
- ADJUSTMENTS AND INFORMATION 34
- Unitary Products Group 35 35
- BLOWER ROTATION 36
- BELT TENSION 36
- FIGURE 25 - BELT ADJUSTMENT 36
- Unitary Products Group 37 37
- 38 Unitary Products Group 38
- Unitary Products Group 39 39
- 40 Unitary Products Group 40
- Unitary Products Group 41 41
- 42 Unitary Products Group 42
- Unitary Products Group 43 43
- 44 Unitary Products Group 44
- Unitary Products Group 45 45
- 46 Unitary Products Group 46
- Unitary Products Group 47 47
- 48 Unitary Products Group 48
- Unitary Products Group 49 49
- 50 Unitary Products Group 50
- Unitary Products Group 51 51
- 52 Unitary Products Group 52
- Unitary Products Group 53 53
- 54 Unitary Products Group 54
- AIR BALANCE 56
- $LUIORZ&)0 57
- SUPPLY AIR DRIVE ADJUSTMENT 58
- OPERATION 60
- SAFETY CONTROLS 61
- COMPRESSOR PROTECTION 62
- 50” CABINET 62
- GAS HEATING OPERATION ERRORS 64
- START-UP (COOLING) 65
- START-UP (GAS HEAT) 66
- CHECKING GAS INPUT 67
- TABLE 69: GAS HEAT STAGES 67
- CHARGING THE UNIT 69
- 70 Unitary Products Group 70
- Unitary Products Group 71 71
- 72 Unitary Products Group 72
- TROUBLESHOOTING 73
- 74 Unitary Products Group 74
- Power to 75
- 76 Unitary Products Group 76
- COOLING TROUBLESHOOTING GUIDE 77
- 82 Unitary Products Group 82
- Unitary Products Group 83 83
- Unitary 5005 Norman 84
- Products York OK 84
- Group Drive 73069 84
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