Rivacold MH-HT, Use And Maintenance Handbook

Page: 26 / 72

MH TH Pag. 26 REV. 08 11/07
UK
F
The compressor runs continuously or for long periods
1
Insufficient refrigerant gas charge.
2 Thermostat contacts blocked in the closed
position.
3 System insufficiently sized for the charge.
4
Excess charge to be cooled or insufficient
insulation.
5 Evaporator covered with ice.
6 System circuit restriction.
7 Condenser blocked.
1
Repair any leaks and add refrigerant gas.
2 Replace the thermostat.
3
Replace the system with a more powerful
one.
4 Reduce the charge or improve the
insulation, if possible.
5 Defrost.
6 Identify the cause and remove it.
7 Clean the condenser.
G
Run capacitor damaged, interrupted or short circuited
1
Incorrect run capacitor
1
Replace with a capacitor of the correct
type.
H
Starter relay faulty or burnt out
1
Incorrect relay.
2 Relay fitted in incorrect position.
3 Incorrect run capacitor
1
Replace with a relay of the correct type.
2 Fit the relay in the correct position.
3 Replace with a capacitor of the correct
type.
I
Coldroom temperature too high
1
Thermostat set too high.
2 Undersized expansion valve.
3
Undersized evaporator.
4
Insufficient air circulation.
1
Adjust the setting.
2 Replace the expansion valve with one of a
suitable type
3 Replace with an evaporator with a larger
surface area
4 Improve air circulation
L
Suction pipes frosted
1 Excessive passage of gas through the expansion
valve or valve oversized.
2 Expansion valve locked in the open position.
3 The evaporator fan motor does not work.
4 High gas charge.
1 Adjust the valve or replace it with one of
the correct size.
2 Clean foreign bodies from the valve and
replace if necessary.
3 Find the cause and remove it.
4 Reduce the charge.
M
Discharge pipe frosted or wet
1
Drier filter restriction.
2 Valve on the discharge line partially closed.
1
Replace the filter.
2 Open the valve or replace it if necessary.