Controls, Start-Up, Operation, Service and ... - Climayoreo

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Table 87 — CCN/Linkage Display Table ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS LINK CCN - LINKAGE MODE Linkage Active - CCN ON/OFF MODELINK L.Z.T Linkage Zone Control Tmp dF LZT L.C.SP Linkage Curr. Cool Setpt dF LCSP L.H.SP Linkage Curr. Heat Setpt dF LHSP Table 88 — Compressor Run Hours Display Table ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS HRS COMPRESSOR RUN HOURS HR.A1 Compressor A1 Run Hours 0-999999 HRS HOURS_A1 config HR.A2 Compressor A2 Run Hours 0-999999 HRS HOURS_A2 config HR.A3 Compressor A3 Run Hours 0-999999 HRS HOURS_A3 config HR.B1 Compressor B1 Run Hours 0-999999 HRS HOURS_B1 config HR.B2 Compressor B2 Run Hours 0-999999 HRS HOURS_B2 config HR.B3 Compressor B3 Run Hours 0-999999 HRS HOURS_B3 config Alarms and Alerts — There are a variety of different alerts and alarms in the system. P — Pre-Alert: Part of the unit is temporarily down. The alarm is not broadcast on the CCN network. The alarm relay is not energized. After an allowable number of retries, if the function does not recover, the pre-alert will be upgraded to an alert or an alarm. T — Alert: Part of the unit is down, but the unit is still partially able to provide cooling or heating. A — Alarm: The unit is down and is unable to provide cooling or heating. All alarms are displayed with a code of AXXX where the A is the category of alarm (Pre-Alert, Alert, or Alarm) and XXX is the number. The response of the control system to various alerts and alarms depends on the seriousness of the particular alert or alarm. In the mildest case, an alert does not affect the operation of the unit in any manner. An alert can also cause a “strike.” A “striking” alert will cause the circuit to shut down for 15 minutes. This feature reduces the likelihood of false alarms causing a properly working system to be shut down incorrectly. If three strikes occur before the circuit has an opportunity to show that it can function properly, the circuit will strike out, causing the shutdown alarm for that particular circuit. Once activated, the shutdown alarm can only be cleared via an alarm reset. Circuits with strikes are given an opportunity to reset their strike counter to zero. As discussed above, a strike typically causes the circuit to shut down. Fifteen minutes later, that Table 89 — Compressor Starts Display Table ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS STRT COMPRESSOR STARTS ST.A1 Compressor A1 Starts 0-999999 CY_A1 config ST.A2 Compressor A2 Starts 0-999999 CY_A2 config ST.A3 Compressor A3 Starts 0-999999 CY_A3 config ST.B1 Compressor B1 Starts 0-999999 CY_B1 config ST.B2 Compressor B2 Starts 0-999999 CY_B2 config ST.B3 Compressor B3 Starts 0-999999 CY_B3 config Table 90 — Software Version Numbers Display Table ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS VERS SOFTWARE VERSION NUMBERS MBB CESR131461-xx-xx string RXB CESR131465-xx-xx string EXB CESR131465-xx-xx string CEM CESR131174-xx-xx string CXB CESR131173-xx-xx string SCB CESR131226-xx-xx string VFD1 VERSION-313D string VFD2 VERSION-313D string MARQ CESR131171-xx-xx string NAVI CESR130227-xx-xx string 106 circuit will once again be allowed to run. If the circuit is able to run for 1 minute, its replacement circuit will be allowed to shut down (if not required to run to satisfy requested stages). However, the “troubled” circuit must run continuously for 5 minutes with no detectable problems before the strike counter is reset to zero. In addition, the compressors have several diagnostics monitoring the safety of the system which may cause a number of attempts to be re-tried before locking out the system from operation. This feature reduces the likelihood of false alarms causing a properly working system to be shutdown incorrectly. For the compressor and circuit diagnostics, some of these alerts/alarms will not broadcast an initial failure to the CCN network until all attempts to recover have occurred and failed. These alerts will be accessible in the alarm history of the control (AlarmsHIST). All the alarms and alerts are summarized in Table 91. DIAGNOSTIC ALARM CODES AND POSSIBLE CAUSES T048 (Ckt A, Oil Return Not Reliable with Only One Comp Available) T049 (Ckt B, Oil Return Not Reliable with Only One Comp Available) — Alert codes T048 and T049 are for circuits A and B respectively and are active for size 090 and 100 units only. Size 090 and 100 units have 3 compressors per circuit. If load conditions are such that only one compressor is running on a circuit, a second compressor is periodically turned on to
equalize compressor oil levels. If a second compressor is unavailable for oil return, the circuit will be shut down, and an alert will be generated. The alert will automatically clear, and the circuit will restart when a second compressor becomes available. T051 (Circuit A, Compressor 1 Failure) T052 (Circuit A, Compressor 2 Failure) T053 (Circuit A, Compressor 3 Failure) T054 (Circuit B, Compressor 1 Failure) T055 (Circuit B, Compressor 2 Failure) T056 (Circuit B, Compressor 3 Failure) — If the current sensor board reads OFF while the compressor relay has been commanded ON for a period of 4 continuous seconds, an alert is generated. Any time this alert occurs, a strike will be logged on the affected compressor. If three successive strikes occur the compressor will be locked out requiring a manual reset or power reset of the unit. The clearing of strikes during compressor operation is a combination of 3 complete cycles or 15 continuous minutes of run time operation. So, if there are one or two strikes on the compressor and three short cycles (ON-OFF, ON-OFF, ON- OFF) occur in less than 15 minutes, the strikes will be reset to zero for the affected compressor. Also, if the compressor turns on and runs for 15 minutes straight with no compressor failure, the compressor's strikes are cleared as well. NOTE: Until the compressor is locked out, for the first two strikes, the alert will not be broadcast to the network, nor will the alarm relay be closed. The possible causes are: • High pressure switch open. The high pressure switch for each circuit is wired in series with the compressor contactor coils of each compressor on the circuit to disable compressor operation immediately upon a high discharge pressure condition. If the high pressure switch opens while the MBB or CXB is commanding the compressor ON, the compressor stops and the CSB no longer detects current, causing the control to activate the alert. • Compressor circuit breaker tripped. • Failed CSB or wiring error. To check out alerts T051, T052, T053, T054, T055, T056: 1. Turn on faulty compressor using Service Test mode. If the compressor does not start, then most likely the problem is one of the following: HPS is open, compressor circuit breaker is tripped, incorrect control wiring, or incorrect compressor wiring. 2. If the compressor starts, verify that the indoor and outdoor fans are operating properly. 3. If the CSB is always detecting current, then verify that the compressor is on. If the compressor is ON, check the contactor and the relay on the MBB or CXB. If the compressor is OFF and there is no current, verify the CSB wiring and replace if necessary. 4. Return to Normal mode and observe compressor operation to verify that compressor current sensor is working and condenser fans are energized. A051 (Circuit A, Compressor 1 Stuck On Failure) A052 (Circuit A, Compressor 2 Stuck On Failure) A053 (Circuit A, Compressor 3 Stuck On Failure) A054 (Circuit B, Compressor 1 Stuck On Failure) A055 (Circuit B, Compressor 2 Stuck On Failure) A056 (Circuit B, Compressor 3 Stuck On Failure) — If the current sensor board reads ON while the compressor relay has been commanded OFF for a period of 4 continuous seconds, an alarm is generated and the HVAC Mode will display 107 Compressor Stuck On. These alarms are only monitored for a period of 10 seconds after the compressor relay has been commanded OFF. This is done to facilitate a service technician forcing a relay to test a compressor. When the HVAC Mode indicates a compressor stuck on condition, the following will occur: 1. The outdoor fans will continue to control head pressure. 2. The supply fan will remain on. 3. Heating will be disabled. A manual reset or power reset of the unit is required for these alarms. The possible causes are: • Compressor contactor has failed closed. • Relay output on MBB or CXB that drives compressor contactor has failed closed. • Failed CSB or wiring error. To check out alerts A051, A052, A053, A054, A055, A056: 1. Place the unit in Service Test mode. All compressors should be OFF. 2. Check for welded compressor contactor. 3. Verify there is not 24 vac across the contactor coil of the compressor in question. If 24 vac is measured across coil, check relay on MBB or CXB and associated wiring. 4. Verify CSB wiring. 5. Return to Normal mode and observe compressor operation to verify that compressor current sensor is working and condenser fans are energized after compressor starts. T057 (Circuit A, High Pressure Switch Failure) T058 (Circuit B, High Pressure Switch Failure) — The high pressure switch for each circuit is wired in series with the compressor contactor coils of each compressor on the circuit to disable compressor operation immediately upon a high discharge pressure condition. The normally closed contacts in the switches are calibrated to open at 650 ± 10 psig which corresponds to a saturated condensing temperature of 155.6 ± 1.3 F. The pressure switches will automatically reset when the discharge pressure is reduced to 500 ± 15 psig which corresponds to a saturated condensing temperature of 134.1 ± 2.4 F. The output of each high pressure switch is wired to inputs on the RXB to provide the control with an indication of a high pressure switch trip. This alarm could occur when compressors are off if the wiring to the switch is broken or the switch has failed open. If the high pressure switch trips on a circuit with compressors commanded on, the discharge pressure is recorded. If the recorded discharge pressure is between 630 to 660 psig (saturated condensing temperature between 153.0 and 156.9 F), and is also less than the value recorded on any previous high pressure switch trip, the upper horizontal portion of the compressor operating envelope (see Fig. 18) is lowered 0.4 F (3 psig). The control will not allow the compressor operating envelope to be lowered below 153.0 F (630 psig). This is done to make a rough calibration of the high pressure switch trip point. In most cases this allows the control to detect a high head pressure condition prior to reaching the high pressure switch trip point. When the trip occurs, all mechanical cooling on the circuit is shut down for 15 minutes. After 15 minutes, the circuit is allowed to restart. T068 (Circuit A Return Gas Thermistor Failure) — This alarm trips during a thermistor failure of the return gas temperature sensor. It is used with MLV option only.
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Controls, Start-Up, Operation, Serv
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WARNING What to do if you smell gas
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and the ENTER keys until the desire
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START-UP IMPORTANT: Do not attempt
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Table 4 — Fan Performance — 48P
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AIRFLOW (cfm) Table 10 — Fan Perf
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AIRFLOW (Cfm) LEGEND Table 18 — F
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AIRFLOW (cfm) LEGEND Bhp — Brake
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HIGH-EFFICIENCY MOTORS Nominal Maxi
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2. Under the Setpoints menu, set th
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would use Period 2 and set days Sat
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there is a loss of communication be
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and when ON, the control sets a cap
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System Mode Test — When the syste
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Table 31 — Unit Configuration ITE
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SETTING UP THE SYSTEM Machine Contr
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High SST Alert Delay Time (H.SST)
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Table 36 — Cool/Heat Set Point Of
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Table 38 — Run Status Cool Displa
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To use Demand Limiting, select the
Page 55 and 56: Size 050, 055, 060 Contactor OFM(s)
Page 57 and 58: Whenever the outdoor ambient temper
Page 59 and 60: Demand Level Low Heat Off Offset (L
Page 61 and 62: Limit Switch Low Temp (SW.L.T) —
Page 63 and 64: STAGE Table 49 — IGC LED Indicato
Page 65 and 66: Table 50 — Static Pressure Contro
Page 67 and 68: Table 53 — Dirty Filter Switch Po
Page 69 and 70: NOTE: If the user wishes to disable
Page 71 and 72: the economizer modulates when attem
Page 73 and 74: P = K * BP.P * (error) I = K * BP.I
Page 75 and 76: its smoke. Closing the economizer (
Page 77 and 78: Table 57 — Indoor Air Quality Con
Page 79 and 80: Table 58 — Humidity Configuration
Page 81 and 82: The default sensor is the return ai
Page 83 and 84: TEMPERATURE COMPENSATED START LOGIC
Page 85 and 86: Sensor Trim Configuration — The T
Page 87 and 88: SUPPLY FAN VFD CONFIGURATION — Th
Page 89 and 90: REMOTE SWITCH LOGIC CONFIGURATION (
Page 91 and 92: Alarms and Alarm History for for an
Page 93 and 94: Transducer Troubleshooting — The
Page 95 and 96: Table 75 — 10K Thermistor vs Resi
Page 97 and 98: TEMP RESISTANCE (F) (Ohms) -25 98,0
Page 99 and 100: PRESSURE (PSIG) Table 80 — Suctio
Page 101 and 102: Table 81 — Discharge Pressure Tra
Page 103 and 104: Table 82 — Auto View of Run Statu
Page 105: Table 84 — Cooling Information Di
Page 109 and 110: Table 91 — Alert and Alarm Codes
Page 111 and 112: T072 (Evaporator Discharge Reset Se
Page 113 and 114: This alarm will disable mechanical
Page 115 and 116: This is the reverse of the Pressuri
Page 117 and 118: 117 a48-8408 Fig. 19 — Typical Po
Page 119 and 120: OD ENTHALPY SWITCH LOW REMOTE OCCUP
Page 121 and 122: Fig. 23 — Typical Electric Heat U
Page 123 and 124: 123 Fig. 25 — Typical Gas Heat Se
Page 125 and 126: 125 Fig. 27 — Component Arrangeme
Page 127 and 128: ACCSY — Accessory ACC’Y — Acc
Page 129 and 130: Table 93 — Rooftop Control Board
Page 131 and 132: Table 96 — Control Expansion Modu
Page 133 and 134: LEGEND IAQ — Indoor Air Quality V
Page 135 and 136: the motor position to be configured
Page 137 and 138: TIME EWT LWT SETP Run Status Servic
Page 139 and 140: Fig. 37 — Door Latch Fig. 38 —
Page 141 and 142: SUPPLY FAN AND POWER EXHAUST MOTOR
Page 143 and 144: Routine cleaning of coil surfaces i
Page 145 and 146: Saturated Discharge Temperature (de
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Saturated Discharge Temperature (de
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Gas System Adjustment (48P Only) GA
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APPENDIX A — LOCAL DISPLAY TABLES
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APPENDIX B — CCN TABLES (cont) ST
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APPENDIX B — CCN TABLES (cont) ST
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APPENDIX B — CCN TABLES (cont) SE
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APPENDIX B — CCN TABLES (cont) MA
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APPENDIX B — CCN TABLES (cont) MA
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TESTACTC TESTCOOL TESTFANS TESTHEAT
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APPENDIX C — UNIT STAGING TABLES
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* 41 for Supply Fan Motor VFD, 42 f
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Fig. B — VFD Keypad START UP WITH
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Upload All Parameters — To upload
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To replace the main fan for frame s
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ALARM CODE ALARM NAME IN PANEL 2001
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APPENDIX E — MODE SELECTION PROCE
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CONTROLS SET POINT AND CONFIGURATIO
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