Quietside Heat Pump Troubleshooting

Here you can find the tables containing detailed descriptions of Quietside technical issues which may happen during its operation time. Heat pump troubleshooting is presented as a short manual with codes and problems that they denote.

If you have encountered some Quietside boiler problems, find the error code or problem description in the list and look for the solutions or recommendations. There may be several causes for one problem and you need to check them all. Sometimes the solution is simple, like remote replacement. If you see that the cause is too complicated for you to cope with, call technical specialists and ask them for help.

Quietside 090W1-NG Heat Pump Troubleshooting

Yellow lightRed lightGreen lightIndoor unit displayName of running status
Blink onceCompressor start
Blink twiceH1Defrosting
Blink three timesE2Anti-freezing protection
Blink four timesH5IPM protection
Blink five timesE5Overcurrent protection
Blink six timesH4Overload protection
Blink seven timesE4Air exhaust protection
Blink eight timesH3Overload protection
Blink onceLimited frequency (current)
Blink twiceLimited frequency (Air exhaust)
Blink three timesLimited frequency (overload)
Blink four timesLimited frequency (anti-freezing)
Blink five timesF3Outdoor unit ambient sensor malfunction
Blink six timesF4Outdoor unit tube temp, sensor malfunction
Blink seven timesF5Outdoor air exhaust sensor malfunction
Blink eight timesAchieve the temperature of unitstartsup
Blink continuouslyCommunication is normal
OFFE6Communication malfunction
Blink nine timesH3Overload sensor malfunction
Blink twelve timesPLLow voltage protection
Blink thirteen timesPHHigh voltage protection
F1Indoor ambient sensor malfunction
F2Indoor tube temperature sensormalfunction
P1Normal cooling or norminal heating
P2Max. cooling or max. heating
P3Interim cooling or interim heating
POMin. cooling or Min. heating

Quietside QSVSIO-09A Heat Pump Troubleshooting

Error CodeCauseTroubleshooting
01) Overheat• Clogged / Reduced flow in heating system• Check strainer clean if required
• Circulating pump failure• Check system for flowrate
• Check pump for operation -115V AC = 1 Amp
02) Low Water Level• No water in system / Pump failure• Check system / Check pump
• No make up water supply• Check system
• Water fill valve failure• Check system 5V DC- input signal
03 / Ignition Failure• Check ignition transformer• Input 115V AC
• Check high limit switch / fuse• N/C contacts
• No gas supply• Check gas connection
• Air pressure switch tripped• Check gas valve
• Check tube for connection
• Check flue for blockage
04 / Flame Sensor• Low gas pressure• Check gas valve pressure operated
• Fan failure / Airflow pressure switch• Check gas pressure
• Check fan for operation
• Check switch, flue for obstruction
05 / Heating Sensor Wire Disconnected• Check molex connection• Re - connect
06 / Heating Sensor Short Circuit• Non-applicable
07 / Hot Water Sensor Wire Disconnected• Non-applicable
08 / Hot Water Sensor Short Circuit• Sensor failure• Check voltage @Pin #19&8 on 21 Pin connector, main controller 5V DC
09 / Fan RPM Failure• Fan failure• Check fan for operation. Input voltage 7 - 40V DC. Red-Black wires
• Check speed control
10 / Air Pressure Switch Failure• Fan failure• Check fan for operation
• Air flow switch failure• Check tube connection
• Blocked flue• Check voltage 5V DC
• Excessive wind gusts• Check flue for blockage
• Check flue termination - relocate
11/ Water level Detection Failure• Check water fill valve• Voltage 5V DC
12 / Flame Failure• Low gas pressure• Check gas pressure
• Fan failure / Air flow sensor• Check gas valve
• Blocked flue• Check fan for operation
• Check tube on air flow sensor
• Check air flow sensor - 5V DC
• Check flue for obstruction
13 / Heating Water Switch Failure• Faulty switch• Check voltage - 5V DC on Pin #10 on 13 pin and Pin #17 on 21 pin connectors
14 / Gas Alarm (Optional)• Check if connected (Red / Black wire)• Re - connect
• Check gas supply
• Check voltage 5 - 20V DC
15 / Micom Failure• Check connection from t-stat to unit
• Replace t-stat or micom controller
16 / Mechanical Overheat• Pump motor overheat• Check for pump operation 115V AC, approx 1A (dependent on flow rate)
• Fan motor overheat• Check fan for operation
• Check rotation
17 / DIP Switch Setting• Incorrect settings• Check setting especially for 090/125/150 boilers

Quietside QSVSIO-12A Heat Pump Troubleshooting

Possible malfunctionItems to be checked
The unit may drop, shake or emit noise.Has the unit been installed firmly?
It may cause insufficient cooling (heating) capacity.Have you done the refrigerant leakage test?
It may cause condensation and water dripping.Is heat insulation of pipeline sufficient?
It may cause condensation and water dripping.Is water drained well?
It may cause malfunction or damage the parts.Is the voltage of power supply according to the voltage marked on the nameplate?
It may cause malfunction or damage the parts.Is electric wiring and pipeline installed correctly?
It may cause electric leakage.Is the unit grounded securely?
It may cause malfunction or damage the parts.Does the power cord follow the specification?
It may cause insufficient cooling (heating).Is there any obstruction in air inlet and air outlet?
It may cause malfunction or damaging the parts.The dust and sundries caused during installation are removed?
It may cause insufficient cooling (heating) capacity.The gas valve and liquid valve of connection pipe are open completely?

Quietside QS12-VP115 Heat Pump Troubleshooting

ProblemPossible causeSolution
Hot water is not coming out.No power supply to the water heaterCheck if there is any power on the power supply terminal on the thermostat.
The thermostat may be set too high and cause the fuse or safety cut-off to operate.Reduce thermostat setting by 5°C and press the reset button.
Heating is not workingHeating element or internal electrical wiring is out of order.Check if there is any power on the power supply on the connector of the heating element between black and yellow/green wires. If this is OK, press the reset button on the fuse/safety cut-off.
Water is not warm enoughThermostat is set too low.Adjust the thermostat up using a standard screwdriver.
Heating element or the internal electrical wiring is partially out of order.Check the resistance of the heating element on the connector of the heater bundle, and the condition of the internal wiring.
UX mixing valve(fitted on top) is incorrectly adjusted.Adjust the UX mixing valve correctly to the preferred temperature.
Safety valve(SV) is dripping.Water expands when heated. If there is no consumption of hot water over a period of time pressure builds up, causing the safety valve to open.If drip from the SV is severe, it might need to be replaced. Some dripping is normal. Alternatively an expansion vessel can be fitted.
Leak warning outlet is dripping.The heating element may not be properly tightened.Check the heating element o-ring seal and all connections.
Other problems, or if none of the above solves the problem.There may be a leak.Contact the installer/supplier regarding any other failure.

Quietside 150W1-NG Heat Pump Troubleshooting

No water flow from hot taps.1. Mains supply off.1. Check and open stopcock.
2. Strainer blocked.2. Turn off water supply. Remove strainer and clean.
3. Cold water inlet Pressure Reducing Valve incorrectly fitted.3. Check and refit as required
Water from hot taps is cold.1. Immersion heaters not switched on.1. Check and switch on..
2. Immersion heater thermal cut-out has operated.2. Check and reset button.
3. Programmer set to central heating or not switched on.3. Check and set to hot water.
4. Boiler not working4. Check boiler operation. If fault suspected, consult installer or boiler manufacturer.
5. Cylinder thermal cut-out has operated. (Indirect units only).5. As at No.2
6. Motorised valve not operating correctly.6. Check wiring and/or plumbing connections to motorized valve.
Intermittent water discharge1. Reduced internal expansion.1. Repressurize expansion vessel.
2. Thermal control failure. (Note Water will be hot).2. Switch off power to immersion heater(s) and boiler supply to the unit. When discharge has stopped, check thermal controls, replace it faulty. Contact a competent person.
Continuous water discharge1. Cold water inlet Pressure Reducing Valve not working1. Check pressure from valve if greater than 2.1 bar replace.
2. Temperature and pressure relief valve faulty.2. As No2 of above.
3. Expansion relief valve not working correctly.3. Check and replace if faulty.
Room thermostat does not switch on or not work properlyWireless room thermostat batteries not WorkingReplace new batteries for wireless room thermostat

Quietside Heat Pump Troubleshooting

The OPERATION indication LED(BLUE) blinks when a power plug of the indoor unit is plugged in for the first time.It indicates power is on. The LED stops blinking if the operation ON/OFF button on the remote control unit is pushed.
In a COOL operation mode, the compressor does not operate at a room temperature higher than the setting temperature that the INDOOR FAN should operate. In a HEAT operation mode, the compressor does not operate at a room temperature lower than the setting temperature that indoor fan should operate.In happens after a delay of 3 minutes when the compressor is reoperated. The same phenomenon occurs when a power is on. As a phenomenon that the compressor is reoperated after a delay of 3 minutes, the indoor fan is adjusted automatically with reference to a temperature of the air blew.
Fan speed setting is not allowed in DRY(&) mode.The speed of the indoor fan is set to LL in DRY mode. Fan speed is selected automatically in AUTO mode.
Compressor stops operation intermittently in DRY(C?) mode.Compressor operation is controlled automatically in DRY mode depending on the room temperature and humidity.
Timer LED(ORANGE) of the indoor unit lights up and the air conditioner does not operate.Timer is being activated and the unit is in ready mode.
The unit operates normally if the timer operation is cancelled.
The compressor stops intermittently in a COOL mode or DRY mode, and fan speed of the indoor unit decreases.The compressor stops intermittently or the fan speed of the indoor unit decreases to prevent inside/outside air frozen depending on the inside/outside air temperature.
Compressor of the outdoor unit is operating although it is turned off in a HEAT mode.When the unit is turned off while de-ice is activated, the compressor continues operation for up to 9 minutes(maximum) until the deice is completed.
The compressor and indoor fan stop intermittently in HEAT mode.The compressor and indoor fan stop intermittently if room temperature exceeds a setting temperature in order to protect the compressor from overheated air in a HEAT mode.
Indoor fan and outdoor fan stop operation intermittently in a HEAT mode.The compressor operates in a reverse cycle to remove exterior ice in a HEAT mode, and indoor fan and outdoor fan do not operate intermittently for within 20% of the total heater operation