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

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P126 (Circuit A High Head Pressure, Comp Shutdown) T126 (Circuit A High Head Pressure Alert) A126 (Circuit A High Head Pressure Alarm) P127 (Circuit B High Head Pressure, Comp Shutdown) T127 (Circuit B High Head Pressure Alert) A127 (Circuit B High Head Pressure Alarm) — This alert/ alarm is used to keep the saturated condensing temperature below the compressor operating envelope outlined in Fig. 18. This alert/alarm also attempts to prevent the saturated condensing temperature from reaching the high pressure switch trip point by reducing the upper horizontal portion of the compressor operating envelope to a level slightly below the saturated condensing temperature recorded upon a high pressure switch trip (T057, T058). When TemperaturesREF.TSCTA or Temperatures REF.TSCTB rise above the compressor operating envelope for the corresponding TemperaturesREF.TSSTA or TemperaturesREF.TSSTB, a compressor of the affected circuit will be immediately shut down with pre-alert (P126, P127) and a 10-minute timeguard will be added to the compressor. If the saturated condensing temperature remains above the envelope for 5 more seconds, another compressor of the affected circuit, if it exists, will be shut down with pre-alert (P126, P127) and a 10-minute timeguard will be added to the compressor. This sequence will continue until the last compressor on the circuit is shut down, at which time the circuit will be shut down with alert (T126, T127). This failure follows a 3 strike methodology. When the circuit is shutdown entirely, an alert (T126, T127) is generated and a strike is logged on the circuit. On the third strike, alarm (A126, A127) will be generated which will necessitate a manual reset to get the circuit back running. It is important to note that a strike is called out only if all compressors in the circuit are off at the time of the alert. To prevent nuisance alerts, P126 and P127 show up in the alarm history and locally at the display, but are never broadcast to the network. To recover from these alerts, both a 10-minute hold off timer and saturated condensing temperature returning under the compressor envelope must occur. If recovery occurs, staging will be allowed on the circuit once again. Again, a a48-8508 SDT (F) 112 strike is tied to the circuit going off entirely, not reducing capacity and recovering. Therefore it is possible that multiple P126 and P127 alerts may be stored in alarm history but not broadcast. T128 (Digital Scroll High Discharge Temperature Alert) A128 (Digital Scroll High Discharge Temperature Alarm) — This alert/alarm is for units with a digital scroll compressor only. The digital scroll compressor is equipped with a temperature thermistor that is attached to the discharge line of the compressor. The alert occurs when the discharge temperature thermistor has measured a temperature above 268 F or the thermistor is short circuited. The digital scroll compressor will be shutdown and alert T128 will be generated. The compressor will be allowed to restart after a 30-minute delay and after the thermistor temperature is below 250 F. If five high discharge temperature alerts have occurred within four hours, alarm A128 will be generated which will necessitate a manual reset to start the compressor. A140 (Reverse Rotation Detected) — This alarm performs a check for correct compressor rotation upon power up of the unit. The method for detecting correct rotation is based on the assumption that there will be a drop in suction pressure upon a compressor start if the compressor is rotating in the correct direction. A test is made once, on power up, for suction pressure change on the first compressor of the first circuit to start. Reverse rotation is determined by measuring suction pressure at 3 points in time: • 5 seconds prior to compressor start. • At the instant the compressor starts. • 5 seconds after the compressor starts. The rate of suction pressure change from 5 seconds prior to compressor start to compressor start (rate prior) is compared to the rate of suction pressure change from compressor start to 5 seconds after compressor start (rate after). If (rate after) is less than (rate prior minus 1.25), alarm A140 is generated. 180 170 160 150 140 130 120 110 100 90 80 70 60 50 40 30 20 -30 -20 -10 0 10 20 30 40 50 60 70 80 SST (F) Fig. 18 — High Pressure/SCT Alarm Upper Envelope
This alarm will disable mechanical cooling and will require a manual reset. This alarm may be disabled once the reverse rotation check has been verified by setting Configuration COOLRR.VF = Yes. It is important to note that in Service Test mode, reverse rotation is checked on every compressor start. A150 (Unit is in Emergency Stop) — If the CCN point name “EMSTOP” in the System table is set to emergency stop, the unit will shut down immediately and broadcast an alarm back to the CCN indicating that the unit is down. This alarm will clear when the variable is set back to “enable”. A152 (Unit Down Due to Failure) — This alarm occurs whenever both cooling circuits are unavailable to cool. Mechanical cooling is impossible due to a failure in the system explained through other current alarms. Possible problems are: • plenum pressure switch trips on a return fan tracking unit • the supply fan status alarms have been instructed to shut down the unit • both circuits incapable of cooling due to multiple alerts of compressors and/or pressure alerts • a hardware failure of the main board's analog to digital converter or EEPROM chip • a critical storage failure in EEPROM has rendered the unit inoperable • the unit is configured for inlet guide vanes and the actuator controlling the vanes is in fault. Reset is automatic. T153 (Real Time Clock Hardware Failure) — The RTC clock chip on the MBB is not responding. Recovery is automatic but typically board replacement may be necessary. A154 (Serial EEPROM Hardware Failure) — The unit will be completely shut down. The serial EEPROM chip on the MBB which stores the unit's configurations is not responding. Recovery is automatic but typically board replacement is necessary. T155 (Serial EEPROM Storage Failure Error) — Configuration data in the serial EEPROM chip can not be verified which may mean MBB replacement. It is possible a re-initialization of the database or particular storage area(s) may clean up this problem. Reset is automatic. A156 (Critical Serial EEPROM Storage Fail Error) — The unit is completely shut down. Critical configuration data in the serial EEPROM chip can not be verified which may mean MBB replacement. Recovery is automatic but typically board replacement is necessary. NOTE: The machine will shut down. This may happen after downloading via the CCN if the device code was corrupted. Try downloading again or use the LEN connection to download. A157 (A/D Hardware Failure) — The unit will be completely shut down. The analog to digital conversion chip on the MBB has failed. Recovery is automatic but typically board replacement is necessary. A169 (Expansion Valve Control Board Comm Failure) — Cooling is disabled until communication with the EXV control board is re-established. Recovery is automatic. Reason for failure may be due to incorrect wiring, power loss to the control board, or damage to the RS-485 drivers on the LEN bus. T170 (Compressor Expansion Board Comm Failure) — Compressors A3 and B3 are disabled until communication with the CEB control board is re-established. Recovery is automatic. Reason for failure may be due to incorrect wiring, power loss to the control board, or damage to the RS-485 drivers on the LEN bus. A171 (Staged Gas Control Board Comm Failure) — Staged Gas Heating is disabled until communication with the staged 113 gas control board is re-established. Recovery is automatic. Reason for failure may be due to incorrect wiring, power loss to the staged gas control board, or damage to the RS-485 drivers on the LEN bus. T172 (Control Expansion Module Comm Failure) — Any function associated with a sensor configured for use that resides on the controls expansion module will be disabled until communication is re-established. Recovery is automatic. Reason for failure may be due to incorrect wiring, power loss to the control expansion module, or damage to the RS-485 drivers on the LEN bus. A173 (RXB Board Communication Failure) — As the RXB board is integral to all P Series units, the error will cause a system shutdown until communication is re-established. Recovery is automatic. Reason for failure may be due to incorrect wiring, power loss to the RXB board, or damage to the RS-485 drivers on the LEN bus. A174 (EXB Board Communication Failure) — The EXB board is responsible for building pressure control. Building Pressure control configurations that require this board will cause a complete system shut down when communication failure occurs. Recovery is automatic. Reason for failure may be due to incorrect wiring, power loss to the EXB board, or damage to the RS-485 drivers on the LEN bus. A175 (Supply Fan VFD Communication Failure) — The supply fan is disabled until communication with the supply fan VFD is re-established. Recovery is automatic. Reason for failure may be due to incorrect wiring, power loss to the VFD, or damage to the RS-485 drivers on the LEN bus. T176 (Exhaust Fan VFD Communication Failure) — The exhaust fan is disabled until communication with the exhaust fan VFD is re-established. Recovery is automatic. Reason for failure may be due to incorrect wiring, power loss to the VFD, or damage to the RS-485 drivers on the LEN bus. T177 (4-20 mA Demand Limit Failure) — If this transducer fails, and the unit is configured to perform demand limiting with this transducer, no capacity limiting will be performed and an alert will be generated. Recovery is automatic. Reason for error is either a faulty sensor, wiring error, or damaged input on the CEM control board. T178 (4-20 mA Static Pressure Reset Fail) — If this transducer fails, and the unit is configured to perform static pressure reset with this transducer, no static pressure reset will be performed and an alert will be generated. Recovery is automatic. Reason for error is either a faulty sensor, wiring error, or damaged input on the CEM control board. A200 (Linkage Timeout Error — Comm Failure) — If linkage is established via the CCN with ComfortID terminals, a 5-minute timeout on loss of communication will be monitored. If 5 minutes expires since the last communication from a VAV Linkage Master, the unit will remove the link and flag the alert. When the rooftop loses its link, the temperature and set points are derived locally. Recovery is automatic on re-establishment of communications. Reason for failure may be wiring error, too much bus activity, or damaged RS-485 drivers. T210 (Building Pressure Transducer Failure) — If the building pressure transducer (PressuresAIR.PBP) fails, building pressure control fails also. Recovery is automatic. Reason for error is either a faulty sensor, wiring error, or damaged input on the RXB control board. T211 (Static Pressure Transducer Failure) — If the static pressure transducer (PressuresAIR.PSP) fails, static pressure control fails also. Recovery is automatic. Reason for error is either a faulty sensor, wiring error, or damaged input on the RXB control board. T220 (Indoor Air Quality Sensor Failure) — If the indoor air quality sensor (InputsAIR.QIAQ) fails, demand control ventilation is not possible. The control defaults to the max vent
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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
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Size 050, 055, 060 Contactor OFM(s)
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Whenever the outdoor ambient temper
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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 and 106: Table 84 — Cooling Information Di
Page 107 and 108: equalize compressor oil levels. If
Page 109 and 110: Table 91 — Alert and Alarm Codes
Page 111: T072 (Evaporator Discharge Reset Se
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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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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Controls, Start-Up, Operation, Service and ... - Climayoreo

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