Modine PDP150LP Bedienerhandbuch PDF herunterladen (Seite 18)

6-560.4

SERVICE / MAINTENANCE / TROUBLESHOOTING

General Maintenance

The unit and venting system must be checked once a year by a

qualified service technician.

All installation and service of these units must be

performed by a qualified installation and service agency.

Before any service, BE SURE TO TURN OFF GAS AT THE

MANUAL SHUT-OFF VALVE AHEAD OF THE COMBINATION

GAS CONTROL AND TURN OFF ALL ELECTRIC POWER TO

THE HEATER.

Table 18.1 - Troubleshooting

TROUBLE POSSIBLE CAUSE POSSIBLE REMEDY

Unit does nothing 1. Power supply is off 1. Turn on main power

2. No 24V power to thermostat 2 a. Check control transformer

b. If failed transformer - check thermostat wire gage and length

3. Thermostat malfunction 3 a. Verify wire connections to R&W terminals only

b. Check / replace thermostat

4. LED flashes 4. Check LED flash code

5. Blown fuse on control board 5. Replace fuse

6. Defective control 6. Replace control

LED light off or 1. Blown fuse on control board 1. Replace fuse

flashing 2. Multiple causes 2. Control board LED flash codes vary with control type. A decal is

installed in the unit giving a brief description of the applicable codes

for your heater. For more detail, see the control board data sheet

included with the unit.

Unit starts but does 1. Main gas is off 1. Open manual gas valve

not ignite 2. Air in gas line 2. Purge gas line

3. Main or manifold gas pressure 3. Set gas pressures per manual instructions

4. Check gas valve switch 4. Set gas valve switch to "ON" position

Unit goes through cycle 1. Reversed main power polarity 1. Black wire - HOT, White wire - NEUTRAL, Green wire - GROUND

but the burners go out 2. Unit not grounded 2. Ground unit and verify quality of ground connection

in less then 10 seconds 3. Flame not sensed 3. Check flame sensor probe and connection

Air circulating fan 1. Loose connections 1. Check all connections

inoperable 2. Defective control board 2. Check control board data sheet and function

3. Defective fan motor 3. Check fan motor

CAUTION

1. Service or repair of this equipment must be performed by

a qualified service agency.

2. Do not attempt to reuse any mechanical or electrical

controllers which have been wet. Replace defective

controller.

When servicing or repairing this equipment, use only factory-

approved service replacement parts. A complete replacement

parts list may be obtained by contacting the factory. Refer

to the rating plate on the appliance for complete appliance

model number, serial number, and company address. Any

substitution of parts or controls not approved by the factory

willbeattheowner’srisk.

NOTE: To check most of the Possible Remedies in the

troubleshooting guide listed in Table 18.1, refer to the applicable

sections of the manual.

1. Service air moving components annually.

a. Check fan for fit on motor shaft and for damage to blades.

2. Keep unit free from dust, dirt, grease, and foreign matter,

paying particular attention to:

a. Combustion air inlets.

b. Burners and burner orifices. Turn off gas ahead of the

combination gas control and shut off electric power to the

heater. Remove the access panel, open the union on the

gas line, and disconnect the igniter and sensor wires.

Remove the screws that attach the burner tray to the

header plate and remove the burner tray and manifold

assembly from the heater. Carefully clean the burners with

a wire brush or other suitable means. Replace any

damaged or deteriorating burners or orifices. Install the

burner assembly back onto the header, making certain that

all screws, pipes and electrical connections are tight.

CAUTION: Be careful when handling the igniter and flame

sensor.

3. Inspect the flame sensor and igniter for deterioration and/or

cracks.

4. Verify that the burners are touching each other at the

carryover points. This will ensure flame carryover from burner

to burner.

a. Clean exterior of heat exchanger tubes.

b. Fan blades.

5. Check wiring for possible loose connections.

6. The gas valves and piping should be checked annually for

general cleanliness and tightness. The gas controls should be

checked to insure that the unit is operating properly. See

control instruction sheets furnished separately with the unit

heater.

7. The power exhaust motor bearings have been lubricated for

long life and do not require additional lubrication. In dirty

atmospheres, it may be desirable to clean the motors and

blower housing and blow out the cooling air passages of the

motor with compressed air.

8. Perform periodic cleaning of inlet and vent terminal screens.

ARNING

1 2 ... 13 14 15 16 17 18 19 20

Kommentare zu diesen Handbüchern

Keine Kommentare

Modine PDP150LP Bedienerhandbuch Seite 18

Kommentare zu diesen Handbüchern