Carrier Aquazone 50HQL Installation, Start-up And Service Instructions Manual

Also see for AQUAZONE VQL: Operating and troubleshooting

Contents

Carrier Aquazone 50HQL Installation, Start-up And Service Instructions Manual Manual pdf 33 page image

33EMERGENCY HEAT — In Emergency Heat mode, the FanEnable and Fan Speed relays are turned on. The EH1 output isturned on immediately. With continuing Emergency Heat de-mand, EH2 will turn on after 5 minutes. Fan Enable and FanSpeed relays are turned off after a 60-second delay. The controlreverts to Standby mode.Output EH1, EH2, Fan Enable, and Fan Speed will be ON ifthe G input is not active during Emergency Heat mode.COOLING STAGE 1 — In Cooling Stage 1 mode, the FanEnable, compressor and RV relays are turned on immediately.If configured as stage 2 (DIP switch set to OFF) then the com-pressor and fan will not turn on until there is a stage 2 demand.The Fan Enable and compressor relays are turned off immedi-ately when the Cooling Stage 1 demand is removed. The con-trol reverts to Standby mode. The RV relay remains on untilthere is a heating demand. If there is a master/slave or dualcompressor application, all compressor relays and related func-tions will track with their associated DIP switch 2 on S1.COOLING STAGE 2 — In Cooling Stage 2 mode, the FanEnable, compressor and RV relays remain on. The Fan Speedrelay is turned on immediately and turned off once the CoolingStage 2 demand is removed. The control reverts to CoolingStage 1 mode. If there is a master/slave or dual compressor ap-plication, all compressor relays and related functions will trackwith their associated DIP switch 2 on S1.NIGHT LOW LIMIT (NLL) STAGED HEATING — In NLLstaged Heating mode, the override (OVR) input becomesactive and is recognized as a call for heating and the controlwill immediately go into a Heating Stage 1 mode. With anadditional 30 minutes of NLL demand, the control will go intoHeating Stage 2 mode. With another additional 30 minutes ofNLL demand, the control will go into Heating Stage 3 mode.SYSTEM TESTSystem testing provides the ability to check the controloperation. The control enters a 20-minute Test mode by mo-mentarily shorting the test pins. All time delays are increased15 times.Test Mode — To enter Test mode on C or D controls, cyclethe power 3 times within 60 seconds. The LED (light-emittingdiode) will flash a code representing the last fault when enter-ing the Test mode. The alarm relay will also power on and offduring Test mode. See Tables 11-13. To exit Test mode, shortthe terminals for 3 seconds or cycle the power 3 times within60 seconds.NOTE: Deluxe D Control has a flashing code and alarm relaycycling code that will both have the same numerical label.For example, flashing code 1 will have an alarm relay cyclingcode 1. Code 1 indicates the control has not faulted since thelast power off to power on sequence.Retry Mode — In Retry mode, the status LED will start toflash slowly to signal that the control is trying to recover froman input fault. The control will stage off the outputs and try toagain satisfy the thermostat used to terminal Y. Once the ther-mostat input calls are satisfied, the control will continue normaloperation.NOTE: If 3 consecutive faults occur without satisfying thethermostat input call to terminal Y, the control will go intolockout mode. The last fault causing the lockout is stored inmemory and can be viewed by entering Test mode.Aquazone™ Deluxe D Control LED Indica-tors — There are 3 LED indicators on the D Control:STATUS LED — Status LED indicates the current status ormode of the D control. The Status LED light is green.TEST LED — Test LED will be activated any time the Dcontrol is in Test mode. The Test LED light is yellow.FAULT LED — Fault LED light is red. The fault LED willalways flash a code representing the last fault in memory. Ifthere is no fault in memory, the fault LED will flash code 1 onthe and appear as 1 fast flash alternating with a 10-secondpause. See Table 13.Table 11 — C Control Current LED Statusand Alarm Relay OperationsLEGENDNOTES:1. Slow flash is 1 flash every 2 seconds.2. Fast flash is 2 flashes every 1 second.3. EXAMPLE: “Flashing Code 2” is represented by 2 fast flashes followed by a10-second pause. This sequence will repeat continually until the fault iscleared.Table 12 — C Control LED Code andFault DescriptionsLEGENDLED STATUS DESCRIPTION OF OPERATION ALARM RELAYOnNormal Mode OpenNormal Mode withPM WarningCycle(closed 5 sec.,Open 25 sec.)Off C Control is non-functional OpenSlow FlashFault Retry OpenOver/Under Voltage ShutdownOpen(Closed after15 minutes)Fast Flash Lockout ClosedFlashing Code 1 Test Mode — No fault in memory Cycling Code 1Flashing Code 2 Test Mode — HP Fault in memory Cycling Code 2Flashing Code 3 Test Mode — LP Fault in memory Cycling Code 3Flashing Code 4 Test Mode — FP1 Fault in memory Cycling Code 4Flashing Code 5 Test Mode — FP2 Fault in memory Cycling Code 5Flashing Code 6 Test Mode — CO Fault in memory Cycling Code 6Flashing Code 7 Test Mode — Over/Undershutdown in memory Cycling Code 7Flashing Code 8 Test Mode — PM in memory Cycling Code 8Flashing Code 9 Test Mode — FP1/FP2Swapped fault in memory Cycling Code 9CO — Condensate OverflowFP — Freeze ProtectionHP — High PressureLED — Light-Emitting DiodeLP — Low PressurePM — Performance MonitorLEDCODE FAULT DESCRIPTION1 No fault in memory There has been no fault sincethe last power-down to power-upsequence2 High-Pressure Switch HP Open Instantly3 Low-Pressure Switch LP open for 30 continuous sec-onds before or during a call(bypassed for first 60 seconds)4 Freeze Protection Coax— FP1FP1 below Temp limit for 30 con-tinuous seconds (bypassed forfirst 60 seconds of operation)5 Freeze Protection Air Coil— FP2FP2 below Temp limit for 30 con-tinuous seconds (bypassed forfirst 60 seconds of operation)6 Condensate overflow Sense overflow (grounded) for30 continuous seconds7(Autoreset)Over/Under VoltageShutdown"R" power supply is <19VAC or>30VAC8 PM Warning Performance Monitor Warninghas occurred.9 FP1 and FP2 Thermistorsare swappedFP1 temperature is higher thanFP2 in heating/test mode, or FP2temperature is higher than FP1in cooling/test mode.CO — Condensate OverflowFP — Freeze ProtectionHP — High PressureLED — Light-Emitting DiodePM — Performance Monitor