PowerAir Low Voltage - Control Circuit Test and Repair
When testing components with power on, use care to prevent electrical shock.
Serial Number Range: 0703P210001
thru 0903P210361, 0703P220001
thru 0903P221139, 0703P210001
thru 0903P321137, 0703P210001
thru 0902P520467, 0703P210001
thru 0903P720190
|
Model |
P21 | P22 | P32 | P52 | P72 |
| Serial Number | 0703P210001 thru 0903P210361 | 0703P220001 thru 0903P221139 | 0703P210001 thru 0903P321137 | 0703P210001 thru 0902P520467 | 0703P210001 thru 0903P720190 |
1.Remove electrical box cover. Check for broken or loose wiring. Refer to: Electrical Box Cover
2.Check high voltage on contactor relay. Set meter to V. Place meter probes on front, black and white wires. Verify reading is 230 volts.
3.Check Low Voltage from transformer to low voltage wires. Place meter probes on Yellow and Red wire contactor connections. Verify reading is 24 volts.
4.Insert screwdriver into relay to start manually. If system starts, replace contactor relay.
5.Check fuse. Visually check to see if blown. Refer to: Fuse
6.Bypass the remote switch to verify it is not defective. Disconnect the Red, White, and Blue wires from the remote switch. Connect the Blue and Red wires together.
|
Meter Required |
Status |
Required Action |
|---|---|---|
|
High Voltage ≤ Line Voltage |
|
Replace Contactor Relay |
|
Low Voltage ≤ 24 Volts |
|
Replace Transformer |
|
High Voltage = Line Voltage |
|
Contactor Relay OK |
|
Low Voltage = 24 Volts |
|
Transformer OK |
Serial Number Range: 0904P210365
thru Present, 0904P221146
thru Present, 0904P321145
thru Present, 0904P520474
thru Present, 0903P720191 thru Present
|
Model |
P21 | P22 | P32 | P52 | P72 |
| Serial Number | 0904P210365 thru Present | 0904P221146 thru Present | 0904P321145 thru Present | 0904P520474 thru Present | 0903P720191 thru Present |
1.Remove electrical box cover. Check for broken or loose wiring. Refer to: Electrical Box Cover
2.Check high voltage on contactor relay. Set meter to V. Place meter probes on front, black and white wires. Verify reading is 230 volts.
3.Check Low Voltage from transformer to low voltage wires. Place meter probes on Yellow and Red wire contactor connections. Verify reading is 24 volts.
4.Insert screwdriver into relay to start manually. If system starts, replace contactor relay.
5.Check fuse. Refer to: Fuse
6.Bypass the remote switch to verify it is not defective. Disconnect the Red, White, and Blue wires from the remote switch. Connect the Blue and Red wires together. If the relay and fans work, then replace remote switch or wiring.
|
Meter Required |
Status |
Required Action |
|---|---|---|
|
High Voltage ≤ Line Voltage |
|
Replace Contactor Relay |
|
Low Voltage ≤ 24 Volts |
|
Replace Transformer |
|
High Voltage = Line Voltage |
|
Contactor Relay OK |
|
Low Voltage = 24 Volts |
|
Transformer OK |
