TROUBLESHOOTING

SOLID STATE HEAT PUMP CONTROL TROUBLESHOOTING PROCEDURE

1.Turn on AC power supply to indoor and outdoor units.

2.Turn thermostat blower switch to “fan on” – the indoor blower should start. (If it doesn’t, troubleshoot indoor unit and correct problem.)

3.Turn thermostat blower switch to “auto” position. Indoor blower should stop.

4.Set system switch to “heat” or “cool”. Adjust thermostat to call for heat or cool – the indoor blower, compressor and outdoor fan should start.

NOTE: If there was no power to 24 volt transformer, the compressor and outdoor fan motor will not start for 5 minutes. This is because of the compressor short cycle protection.

TABLE 5

TROUBLESHOOTING

SYMPTOM

POSSIBLE CAUSES

WHAT TO CHECK

HOW TO CHECK OR REPAIR

 

 

 

 

Compressor contactor

Control circuit wiring

Check for R connection at

Run R connection to outdoor unit to power

does not energize

 

unit, and 24V between R-C

heat pump control

(cooling or heating)

 

 

 

Compressor lock out

1. Check for 24V between

1. If no voltage between L-C turn thermostat

 

 

 

L1-C on heat pump control

off and on again to reset high pressure

 

 

 

switch.

 

 

2. Check across high

2. If high pressure switch is open and will not

 

 

pressure switch.

reset, replace high pressure switch.

 

 

 

 

 

Compressor short cycle

Check for 24V between CC-C

If no voltage betwwen CC-C, jumper speed

 

protection

and Y-C on heat pump control

up terminal and within 10 seconds power

 

 

 

should appear between CC-C. Remove

 

 

 

speed up jumper after 10 seconds.

 

 

 

 

 

Heat pump control

Check all other possible

Replace heat pump control

 

defective

causes. Manual 2100-065

 

 

 

 

 

 

Contactor defective

Check for open or shorted coil

Replace contactor

 

 

winding.

 

 

 

 

 

Fan outdoor motor

Motor defective

Check for open or shorted

Replace motor

does not run (cooling

 

motor winding

 

or heating except

 

 

 

Motor capacitor defective

Check capacitor rating.

Replace capacitor

during defrost)

 

Check for open or shorted

 

 

 

 

 

 

capacitor.

 

 

 

 

 

 

Heat pump control

Check across fan relay on

Replace heat pump control

 

defective

heat pump control (Com-NC)

 

 

 

 

 

Reversing valve does

Reversing valve solenoid

Check for open or shorted coil

Replace solenoid coil

not energize

coil defective

 

 

(heating only)

 

 

 

Heat pump control

Check for 24V between RV-C

1. Check control circuit wiring

 

 

defective

and B-C

2. Replace heat pump control

 

 

 

 

Unit will not go into

Temperature sensor or

Disconnect termperature

1. If unit goes through defrost cycle, replace

defrost

heat pump control

sensor from board and jumper

temperature sensor

(heating only)

defective

across speed up terminals

2. If unit does not go through defrost cycle,

 

 

and sen jump terminals. This

replace heat pump control

 

 

should cause the unit to go

 

 

 

through a defrost cycle within

 

 

 

one minute.

 

 

 

 

 

Unit will not come out

Temperature sensor or

Jumper across speed up

1. If unit comes out of defrost cycle, replace

of defrost

heat pump control

terminals. This should cause

termperature sensor.

(heating only)

defective

the unit to come out of defrost

2. If unit does not come out of defrost cycle,

 

 

within one minute.

replace heat pump control.

 

 

 

 

 

 

 

 

Manual 2100-373

Page 15

Page 16 Page 18
Page 17
Image 17
Bard WH183, WH242 installation instructions Solid State Heat Pump Control Troubleshooting Procedure
Page 16 Page 18

WH183, WH242 specifications

The Bard WH242 and WH183 are innovative heating and cooling systems designed to meet the demands of various residential and commercial applications. These units are recognized for their efficiency, reliability, and advanced technologies, making them popular choices among property owners and HVAC professionals.

The Bard WH242 is a high-capacity unit that delivers optimal temperature control, making it ideal for larger spaces. It boasts a robust design and a powerful compressor, which work together to provide consistent heating and cooling throughout the year. The unit features a multi-speed blower, helping to distribute air evenly while also enhancing comfort levels. Energy efficiency is a key highlight, as the WH242 complies with Energy Star standards, which means it consumes less energy while offering high performance.

On the other hand, the Bard WH183 is designed for smaller spaces without compromising on comfort or efficiency. It incorporates a compact design, making it easier to install in tight spaces. Despite its size, the WH183 is equipped with advanced technologies that ensure reliable operation. Like the WH242, this unit also features a multi-speed blower, which aids in maintaining a steady and comfortable indoor climate.

Both models utilize high-quality insulation and advanced refrigerant management systems that minimize energy loss. The systems are also equipped with advanced diagnostics, allowing for easier maintenance and troubleshooting. This means that HVAC technicians can quickly identify potential issues, ensuring that the units remain operational with minimal downtime.

Overall, the Bard WH242 and WH183 represent cutting-edge solutions for temperature management. Their design emphasizes durability, efficiency, and user-friendliness, appealing to a wide range of customers. With their combination of power, compactness, and advanced features, these units are well-suited for diverse applications, including schools, offices, and residential homes. Whether for heating in the winter or cooling in the summer, Bard's commitment to quality and innovation is evident in both the WH242 and WH183 models, making them a smart choice for efficient climate control.
Top Page Image Contents